Delicious Marshmallow Brownies: Easy Recipes and Tips

Hey there, friend. It feels so good to have you here. There’s a story I have to share. Last week, my friend’s kid asked for something called “volcano brownies.” He meant those marshmallow brownies that bubble and ooze when you cut into them. That simple request brought back the best memories. It’s amazing how a handful of marshmallows can turn a simple brownie into pure magic.

That’s why I’m so excited today. We’re diving straight into the world of marshmallow brownies. This is for everyone. Maybe you bake every weekend. Maybe you only turn on the oven once a year. These recipes are for you. They are fun, forgiving, and guaranteed to make people smile. Let’s grab our bowls and make some magic happen.

Why Add Marshmallows to Brownies?

I get this question a lot. Do marshmallows go well in brownies? The short answer is a huge yes. But let me tell you why. Think about a classic brownie. It’s fudgy, rich, and chocolatey. Now, imagine pockets of sweet, toasted marshmallow tucked inside. When they warm up, they get soft and stretchy. They add this gentle pull and a fluffy cloud-like texture against the dense chocolate. It’s a perfect match.

The fun doesn’t stop there. You can get creative! Have you ever made Oreo marshmallow brownies? Crunchy cookies plus gooey marshmallow is a game-changer. Nutella and marshmallow brownies swirl in extra hazelnut richness. Or maybe you want a brownie with marshmallows and caramel for a double dose of goo. The options are endless and all delicious.

Here’s a little secret from my kitchen. Marshmallows aren’t just for mixing in. You can create a toasted topping. Just sprinkle mini marshmallows on your warm brownies. Pop them back under the broiler for a minute. Watch them puff up and turn golden. It’s the easiest way to make a pan of brownies look and taste like a professional dessert.

Can You Add Marshmallows to Boxed Brownie Mix?

Life gets busy. I use boxed mix all the time. So, can you add marshmallows to boxed brownie mix? Absolutely! It’s the easiest kitchen trick I know. A boxed mix gives you a reliable chocolate base. Your job is to make it special. Adding marshmallows is the fastest way to do that.

You have two main ways to do this. Both work great. The first way is to stir them into the batter. Just fold in 1 to 2 cups of mini marshmallows right before you pour the batter into the pan. They will melt and create lovely gooey streaks throughout the brownie. This method gives you classic marshmallow brownies using brownie mix.

The second way is my favorite for presentation. Bake your brownies as normal. When they come out of the oven, cover the top with a layer of marshmallows. For a marshmallow brownie cake effect, really pile them on! Then, put the pan back in the oven (or under the broiler) for 2-S minutes. This melts and toasts the top. You get this amazing s’mores-like crust. It answers another common question: How to melt marshmallows on top of brownies? It’s that simple.

Here’s a quick tip list for box mix success:

• Use mini marshmallows. They distribute better than large ones.
• If mixing in, coat them in a bit of flour from the mix first. This can help prevent them from sinking straight to the bottom.
• For a topping, watch them closely in the broiler. They can go from toasted to burnt in seconds.
• Feel free to use brands like Betty Crocker. Marshmallow brownies Betty Crocker style are a total crowd-pleaser.

Don’t be afraid to experiment with your box mix. I once made double chocolate marshmallow brownies by adding chocolate chips and marshmallows to a fudge-style mix. It was incredible. The point is to start with something easy and make it your own. That’s where the real joy of baking lives.

What About Marshmallow Fluff?

Maybe you’re wondering about a smoother option. Can you add marshmallow fluff to brownie batter? You sure can. Marshmallow fluff (or creme) gives a different result. Instead of defined gooey pockets, it blends into the batter. This makes the whole brownie incredibly moist and gives it a subtle, sweet marshmallow flavor throughout.

It’s a bit trickier to swirl in neatly because it’s so sticky. My method is simple. Spoon dollops of fluff on top of your batter in the pan. Then, use a knife or skewer to gently swirl it through. Don’t over-mix. You want pretty marbled patterns. This technique works beautifully for something like cherry marshmallow brownies. Add some cherry pie filling along with the fluff swirls. It’s a flavor combo everyone loves.

One quick note. Using fluff might make the center of your brownies extra fudgy. That’s a good thing! Just use a toothpick test near the edge of the pan, not in a fluff swirl, to check for doneness.

Let’s compare the two marshmallow methods in a box mix.

Method	Best For	Pro Tip
Mini Marshmallows (mixed in)	Defined gooey pockets, easy flavor mixes like Oreo marshmallow brownies	Toss in 1 Tbsp of dry mix before folding into batter.
Marshmallow Fluff (swirled)	Overall moistness, marbled look, blended flavor	Use a knife for swirling. A little goes a long way.
Mini Marshmallows (toasted topping)	Visual appeal, s’mores-like taste, marshmallow brownie cake style	Broil for only 1-2 minutes and watch constantly.

Whether you use whole marshmallows or fluff, you’re adding something special. You’re taking a simple treat and giving it a new personality. That’s the heart of baking for me. It’s about creating a little moment of happiness, one gooey square at a time.

Alright, so we’ve chatted about the why and the how of marshmallow magic. But honestly, the chatter only gets you so far, right? The real fun is in the doing. Let’s get our hands a little bit floury and make some of that magic ourselves.

Easy Marshmallow Brownie Recipes

I think the best recipes are the ones that don’t make you sweat. You know the ones—they’re more like a friendly guide than a strict rulebook. That’s what I love about these ideas. They start simple and let you build confidence. Whether you’ve got ten minutes to throw something together or you want to spend a lazy afternoon creating something special, there’s a marshmallow brownie here with your name on it. Trust me, I’ve made every single one of these more times than I can count, usually to clear out a kitchen cupboard or surprise a neighbor. They never fail.

Marshmallow Brownies Using Brownie Mix

Let’s kick things off with the ultimate lifesaver. The clock is ticking, your kid just remembered they promised treats for soccer tomorrow, or you just need a chocolate fix now. This is your moment. You don’t need a pantry that looks like a baking show set. You just need one box and one bag.

Here’s my no-fuss, absolutely-can’t-mess-it-up method for perfect marshmallow brownies using brownie mix every single time. Funny enough, I learned this from my sister, who is famously not a baker. She calls it her “one-box wonder.”

1. Grab Your Box. Any 9×13-inch family-size brownie mix will do. I often use the fudge style because I love that dense base against the fluffy marshmellow. For a classic taste, you can’t go wrong with something like a Betty Crocker mix—making those marshmallow brownies Betty Crocker fans love is a breeze.
2. Mix It Up. Prepare the batter exactly as the box directs. (Eggs, oil, water, you know the drill). Pour about two-thirds of it into your greased pan.
3. The Marshmallow Layer. Now, take 2 to 3 cups of mini marshmallows and scatter them evenly over the batter. Don’t be shy! This is what creates that incredible pull.
4. Top It Off. Carefully spoon and spread the remaining brownie batter over the marshmallows. It’s okay if some peek through—they’re supposed to.
5. Bake & Broil. Bake at the temperature on the box. But here’s the trick: check it about 5 minutes before the minimum bake time. You want the center to be just set. Then, take it out and turn your oven to broil. Quickly sprinkle another cup of mini marshmallows on top. Pop it back in, under the broiler, for just 60-90 seconds. Watch it like a hawk! You’re waiting for that perfect, golden, toasted color.
6. The Hardest Part. Let it cool. Seriously, give it a good hour. This lets the molten marshmallow layer inside set up into that legendary goo. Cutting into it warm is tempting, but waiting gives you those clean, beautiful squares.

The result? A brownie with a secret, stretchy marshmallow core and a toasted, crackly top. It answers the questions “How to melt marshmallows on top of brownies?” and “Can you add marshmallows to boxed brownie mix?” with one delicious pan. It’s practically a marshmallow brownie cake in its own right. If you’re looking for another bar recipe that’s perfect for a big group, you should check out these fantastic cherry bars. They have a similar layered, fruity goodness that people go crazy for.

Oreo Marshmallow Brownies

Now, if you want to see someone’s eyes light up, make these. I brought a batch to a potluck once, and I swear a quiet bidding war started over who got to take the last one home. Combining cookies and brownies feels like a cheat code for deliciousness. The crunch of the Oreo against the soft brownie and the melt-in-your-mouth marshmallow? It’s a texture party.

To make these crowd-pleasing Oreo marshmallow brownies, you can start with your favorite scratch brownie recipe or, you guessed it, a box mix. Here’s the simple add-in routine.

• Chop up about 15-20 Oreo cookies. Don’t make crumbs! You want hearty chunks, some with cream filling still attached.
• Prepare your brownie batter (from scratch or box) and gently fold in the Oreo chunks and 1 ½ cups of mini marshmallows.
• Pour it all into your pan and bake as usual. The marshmallows will create little pockets of goo around the crunchy cookie bits.

Here’s a game-changing variation I stumbled on: the double chocolate marshmallow brownies upgrade. Use Double Stuf Oreos and add a handful of dark chocolate chips to the batter. It’s wildly rich and completely unforgettable. For another treat that nails the sweet-and-salty, crunchy-and-chewy combo, these peanut caramel crunch bars are a must-try. They use marshmallows in such a smart way to bind everything together.

Nutella and Marshmallow Brownies

This one is for the hazelnut lovers. You know who you are—the person who eats Nutella straight from the jar with a spoon. (No judgment here, I’ve been that person). Swirling Nutella into a brownie batter is already a win. But when you add toasted marshmallow into the mix? It becomes something else entirely. It’s like a gourmet candy bar you made yourself.

The key to perfect Nutella and marshmallow brownies is the swirl technique. You want beautiful ribbons, not a muddy blend.

1. Make your brownie batter. A simple, from-scratch cocoa-based one works beautifully here, as it lets the Nutella shine. But a box mix is, as always, a fantastic shortcut.
2. Pour all the batter into your pan and smooth the top.
3. Take big, generous dollops of Nutella (about ½ cup total) and drop them all over the surface. Then, take a butter knife and drag it through the batter in wide, sweeping “S” shapes to marble the Nutella.
4. Bake as directed. When the brownies are done, take them out and immediately cover the top with a thick, even layer of mini marshmallows.
5. Back under the broiler they go for that quick toast. The warmth of the brownie starts melting the marshmallows from below while the broiler crisps the top. It’s pure alchemy.

The flavor is deep, nutty, and insanely indulgent. It’s the kind of dessert that makes you want to pour a big glass of cold milk. It also shares some DNA with another incredible flavor-mashed dessert: Dr. Pepper brownies. That recipe uses soda for a unique twist, just like this one uses Nutella for a signature taste.

By the way, I get this question sometimes: what about making brownies with marshmallows and caramel? Friend, you are speaking my language. For a Nutella version, try drizzling store-bought soft caramel sauce over the batter after you do the Nutella swirl, then add the marshmallows after baking. It’s a next-level move. Or, for a cherry twist, spoon some cherry pie filling over the batter before swirling in some marshmallow fluff for cherry marshmallow brownies that are tart, sweet, and gooey all at once.

And hey, I haven’t forgotten about our friends with dietary needs or egg shortages. Every single one of these recipes can be adapted. The box mix method works perfectly with an eggless brownie recipe base. Just swap in your favorite egg substitute, follow the same layering or mixing steps with the marshmallows, and you’re good to go. Baking should be for everyone.

So there you have it. Three paths to chocolate-marshmallow bliss, each with its own personality. The best part? These aren’t just recipes—they’re starting points. Once you get the feel for how marshmallows behave in the oven (melting, toasting, creating that glorious goo), you’ll start seeing possibilities everywhere. Your kitchen, your rules. Now go preheat that oven. Something amazing is waiting to happen.

More Varieties and Creative Ideas

Okay, so now we’ve got the basics down. But here’s where I feel like the story really gets good. Once you’re comfortable with one version, your mind starts to wander. You look at the jars in your pantry, the leftover bits in the fridge, and think… what if? That “what if” is where the most memorable marshmallow brownies are born. I want to share a few of my favorite adventures that always feel a little bit like a celebration.

Cherry Marshmallow Brownies

Ever since I was a kid, that chocolate-covered cherry cordial at Christmas was the ultimate prize. This brownie is like a whole pan of that feeling, but better because it’s warm from your own oven. Cherry marshmallow brownies are this magical sweet-and-tart orchestra. The juicy cherries cut through the deep chocolate, and the marshmallow is like the sweet, melty conductor holding it all together.

You can go a few routes here. The simplest is to fold a cup of drained, chopped jarred maraschino cherries into your batter along with your mini marshmallows. But my personal favorite method creates layers. First, spread your brownie batter (from a marshmallow brownies using brownie mix shortcut or scratch) in the pan. Then, spoon over about a cup of cherry pie filling in dollops. Top that with your marshmallows—either mini ones mixed in or a fluffy layer for the top. When it bakes, the cherries sink in just a bit, creating these incredible fruity pockets. It’s messy, beautiful, and so delicious.

A quick tip: if you’re using fresh or frozen cherries, toss them with a tablespoon of sugar and let them sit for 20 minutes to draw out some juices. It intensifies their flavor and prevents them from making your batter too wet. Funny enough, this recipe came from trying to use up the last of a jar of cherries after making a pie. Now it’s requested more than the pie!

Double Chocolate Marshmallow Brownies

For my true chocoholic friends, this one’s for you. We’re not playing around. Double chocolate marshmallow brownies are for when you need a dessert that feels like a hug from the inside. We’re talking a rich, dark chocolate base loaded with chocolate chips, and then we add the marshmallow magic. The contrast between the intense chocolate and the sweet, airy marshmallow is just… *chef’s kiss*.

To make these, start with your absolute go-to fudgy brownie recipe. As you’re folding the batter together, stir in a generous cup of semi-sweet or dark chocolate chips. Pour it into the pan. Now, here’s my twist: instead of mixing the marshmallows in, I press them lightly into the top of the unbaked batter. Use about 2 cups of minis, spread evenly. As it bakes, the marshmallows melt down into the brownie, creating a sticky, gooey top layer that also infuses the whole thing with sweetness. It’s less about a toasted top and more about a molten interior. Let them cool completely before cutting, or you’ll have a wonderfully delicious mess on your hands (which, honestly, isn’t the worst thing).

By the way, thinking about ingredients always reminds me that food transparency is so important, especially when you’re baking for others. Knowing where your cocoa comes from or choosing a quality chocolate chip can make a noticeable difference in flavor, not just in ethics.

Marshmallow Brownie Cake

Now, let’s get fancy. Well, “fancy” in the most fun, impressive, but secretly easy way possible. The marshmallow brownie cake is my secret weapon for birthdays, potlucks, or any time I need a guaranteed “wow.” It’s essentially a giant, thick, super-fudgy brownie that you stack and layer like a cake, with marshmallow as the frosting. It sounds involved, but it’s mostly about assembly.

Here’s how I do it: I bake my brownies in two 8-inch round cake pans instead of a rectangle. I use a slightly under-baked, fudgy recipe so the layers stay moist and dense. Let them cool completely. For the “frosting,” I make a simple marshmallow fluff buttercream. You just beat together 1 cup of softened butter with a 7-ounce jar of marshmallow fluff until it’s light and fluffy. Sometimes I’ll fold in a cup of mini marshmallows for extra texture. Spread a thick layer between the two brownie rounds and pile the rest on top. For the grand finale, I toast more mini marshmallows on a baking sheet under the broiler and carefully place them on top of the frosted cake. It looks like a professional bakery creation, but it’s just our beloved brownies, dressed up.

This is also a brilliant way to use a box mix. Just divide the batter between the two round pans and adjust the bake time down a bit. The marshmallow brownies Betty Crocker style transform into a stunning cake with just a little extra effort. It proves that with a simple concept—brownies plus marshmallows—you can create anything from a quick snack to a centerpiece dessert.

Honestly, that’s the beauty of it all. Whether you’re making the simplest brownies with marshmallows and caramel or building a towering cake, you’re participating in this wonderful, creative act. It’s about taking a moment for yourself and others. If you’re looking for more inspiration in this wonderfully chewy, gooey dessert category, I’ve got a whole treasure trove of ideas over on our main page for dessert bars and brownies. It’s where I go when my own pantry isn’t sparking any new ideas.

So, my final thought? Keep a bag of mini marshmallows in the pantry. You never know when the mood for a little kitchen magic will strike. It could turn a regular Tuesday into something special, or solve a last-minute need for something sweet. That’s the real power of these recipes—they’re not just about dessert, they’re about making a moment feel cared for.

Your Marshmallow Brownie Questions, Answered

I’ve gotten so many great questions from friends and readers over the years. Here are the ones that pop up most often, with my tried-and-true answers.

1. Can you add marshmallows to any type of brownie?
   Absolutely! Fudgy, cakey, from-scratch, or marshmallow brownies using brownie mix—they all work. Just remember, fudgy brownies will give you a denser, richer base that contrasts beautifully with the light marshmallow, which is my personal favorite combo.
2. My marshmallows burned on top! How do I prevent that?
   The broiler is a powerful beast. The key is constant watchfulness. Put the pan on a rack in the middle of the oven, not too close to the top heating element. Thirty seconds can be the difference between golden and blackened. Also, using mini marshmallows helps as they toast more evenly and quickly than large ones.
3. Why did my marshmallows disappear into the batter?
   If you mix them in, they’ll mostly melt, creating gooey streaks. If you want visible marshmallow pieces, try pressing them onto the top of the batter just before baking, or use the layered method from the box mix recipe where they’re sandwiched between batter.
4. Can I make marshmallow brownies ahead of time?
   You can, but they’re truly best the day they’re made. The marshmallow topping can get a bit sticky and the interior goo firms up. If you need to, bake them a day ahead, store covered at room temperature, and briefly warm a slice in the microwave for 10 seconds to bring back that fresh-baked feel.
5. Are there any tricks for cutting brownies with a toasted marshmallow top cleanly?
   This is a great question. First, let them cool completely. Then, use a knife that’s been run under very hot water and wiped dry. The heat helps slice through the sticky marshmallow topping without making a huge, pulling mess. Re-wipe and re-heat the knife between cuts.
6. What’s the deal with “Slimming World chocolate marshmallow brownies”?
   This refers to specific recipe adaptations that fit within the Slimming World eating plan, often using ingredients like syn-free cocoa powder and sweetener. They aim to recreate that indulgent marshmallow brownie feeling with fewer calories. The principle of adding marshmallows for gooey texture remains the same!
7. Can I use colored or flavored marshmallows?
   Sure! Strawberry or vanilla-flavored marshmallows can add a fun twist. Just be mindful that some flavors might clash with chocolate. Colored marshmallows are great for holidays—think pastels for Easter or red and green for Christmas.
8. My brownies are undercooked in the middle because of the marshmallow layer. Help!
   This is common with layered versions. Always do the toothpick test at the *edge* of the pan, not the center. The center will be fudgier due to the marshmallow moisture. As long as the edges are set and pulling away from the pan, it’s done. Giving it a full hour to cool and set is non-negotiable here.
9. Can I freeze marshmallow brownies?
   You can, but the texture of the marshmallow will change, becoming a bit more chewy and less fluffy. It’s better to freeze the brownie base without the marshmallow topping, then add fresh marshmallows and toast when you thaw and reheat.
10. What’s the best way to store leftover marshmallow brownies?
    Keep them in an airtight container at room temperature for 1-2 days. If your kitchen is warm or humid, you might want to store them in the fridge to prevent the marshmallow from getting too sticky, but note this will also make them firmer.

There you have it. I hope your baking adventures are filled with that incredible smell of toasted sugar and melted chocolate, and that you find as much joy in making these as people do in eating them. Happy baking, friend.