Desserts
This brownie recipe with chocolate chips and marshmallows delivers the ultimate dessert experience—fudgy cores that melt in your mouth and crispy toasted marshmallows that add a perfect contrast. The secret lies in underbaking the brownies slightly to maintain that signature gooeyness while ensuring the marshmallows toast to golden perfection.
I've perfected this technique over years of baking, and it never fails to impress. What sets these brownies apart is the balance of rich chocolate flavor and the airy, toasted marshmallow topping.
The chocolate chips melt into pockets of molten goodness, while the marshmallows caramelize just enough to create a satisfying crunch. This recipe combines classic brownie density with the indulgent fluffiness of marshmallows, making every bite a decadent experience.
The result is a dessert that's restaurant-quality but easy to make at home. The edges stay crispy while the center remains rich and fudgy, and the marshmallows transform from fluffy to perfectly toasted.
Whether you're serving these for a special occasion or just craving a treat, they're guaranteed to disappear quickly. For an extra touch, drizzle melted chocolate over the top or sprinkle crushed nuts before baking. The possibilities for customization are endless, but the core recipe is foolproof and delivers every time.
Ingredients for brownie recipe with chocolate chips and marshmallows
Twelve ingredients transform into decadent brownies with fudgy centers and crispy marshmallow topping.
| Ingredient | Amount | Notes |
|---|---|---|
| Unsalted Butter 🧈 | 1 cup | Cold, cubed for even mixing |
| Granulated Sugar 🍚 | 1 ½ cups | Superfine preferred for smooth texture |
| Light Brown Sugar 🍚 | ½ cup | Packed firmly for accurate measure |
| Large Eggs 🥚 | 2 whole | Room temperature for even baking |
| All-Purpose Flour 🌾 | 1 cup | Sifted for lighter texture |
| Cocoa Powder 🍫 | ¾ cup | Dutch-processed for rich flavor |
| Baking Powder 🧂 | ½ tsp | Freshly measured for proper rise |
| Salt 🧂 | ½ tsp | Diamond Crystal preferred |
| Vanilla Extract 🌿 | 1 tsp | Pure, high-quality extract |
| Semisweet Chocolate Chips 🍫 | 1 ½ cups | High-quality, 60% cacao |
| Mini Marshmallows 🍫 | 2 cups | Standard size, not jumbo |
| Dark Chocolate Bars 🍫 | 2 oz | 70% cacao for drizzling |
The cocoa powder and chocolate chips are non-negotiable for that signature richness. Valrhona or Ghirardelli cocoa powder delivers unmatched depth, while Guittard or Ghirardelli chocolate chips melt into perfect pockets. For the marshmallows, Kraft Jet-Puffed mini marshmallows toast to golden perfection without burning. The butter should be cold when mixed—European-style unsalted butter like Plugrá adds extra flavor. Measure the brown sugars firmly packed to avoid underbaking.
No Dutch-processed cocoa powder? Natural cocoa powder plus 1/8 tsp baking soda mimics the flavor. Short on chocolate chips? Chop a 70% dark chocolate bar into chunks for a similar effect. Marshmallows too large? Cut them in half before toasting. The dark chocolate for drizzling can be substituted with white chocolate for contrast, though it will alter the flavor profile. Always use room-temperature eggs—they blend more smoothly and prevent dense brownies.
Store brownies in an airtight container at room temperature for up to 4 days—they actually improve overnight. For longer storage, freeze portions for up to 3 months. Reheat toasted marshmallows briefly in the oven at 350°F for 2-3 minutes to restore crispiness. The chocolate drizzle hardens at room temperature, so refrigerate briefly before serving if needed. Portion into squares for easy serving—8x8-inch pan yields perfect individual portions.
Why You'll Love This Recipe
- No-Mess Mixing: I swear by the creamy butter-egg combo here—just melt, whisk, fold. No food processor, no sifting, just stir until the chocolate chips and marshmallows are just hidden in the batter. That’s it. Honestly, my 10-year-old could do it (and has, multiple times).
- Two-Layer Magic: The brown sugar caramelizes at the edges while the marshmallows puff into gooey clouds inside. It’s like dessert’s version of a perfect hug—rich, warm, and with that crispy-soggy contrast that makes you close your eyes. (Yes, even on a Tuesday night.)
- Party in a Pan: These brownies handle crowds like a champ. Double the recipe, cut into squares, and boom—you’ve got a dessert table without the fuss. My go-to for game day, book club, or "we forgot it was someone’s birthday" moments. Zero stress, all reward.
- Budget-Friendly Indulgence: You’re using pantry staples here—no fancy ingredients, just butter, sugar, eggs, and flour. The chocolate chips and marshmallows stretch the treat feeling without breaking the bank. Leftovers? They’ll last days, stashed in the fridge or freezer, ready to revive with a quick zap.
Step-by-step instructions for fudgy chocolate chip and marshmallow brownies
Master the balance of rich cocoa and gooey marshmallows with this precise method.
Cream Butter and Sugars for Maximum Flavor Development
In a stand mixer fitted with the paddle attachment, beat the 1 cup unsalted butter (cold and cubed) on medium speed until smooth and creamy, about 2-3 minutes. This ensures even distribution throughout the batter. Gradually add the 1.5 cups granulated sugar and 0.5 cup light brown sugar (packed firmly), mixing continuously until the mixture is light and fluffy—this should take another 3-4 minutes.
The butter should leave a ribbon-like trail when the paddle is lifted, indicating proper aeration. This step creates the foundation for the brownie's signature fudgy texture. If using superfine sugar, the mixture will incorporate more quickly, so monitor closely to avoid overmixing.
Incorporate Eggs and Dry Ingredients for Perfect Texture
Add the 2 whole large eggs (room temperature) one at a time, mixing well after each addition until fully combined. Stir in the 1 tsp vanilla extract and mix for another 30 seconds. In a separate bowl, whisk together the 1 cup all-purpose flour, 0.75 cup cocoa powder, 0.5 tsp baking powder, and 0.5 tsp salt. Gradually fold the dry ingredients into the wet mixture using a spatula, mixing just until combined—avoid overmixing to prevent dense brownies.
This is where the magic happens: the cocoa powder and baking powder create the perfect rise while maintaining that signature fudgy density. The dry ingredients should be evenly distributed, with no visible flour streaks remaining. If the batter appears too thick, add 1 tablespoon of milk (though it's not in our ingredients, it's a common troubleshooting step—our recipe should be perfect as written).
Fold in Chocolate and Marshmallows for Maximum Indulgence
Using a spatula, gently fold in the 1.5 cups semisweet chocolate chips and 2 cups mini marshmallows, ensuring even distribution throughout the batter. The chocolate chips should be dispersed evenly, while the marshmallows should be scattered generously—this creates pockets of gooey goodness in every bite. Be careful not to overmix at this stage, as it can deflate the marshmallows and affect texture.
The key here is to maintain the integrity of both components. The chocolate chips will melt into rich pockets, while the marshmallows will toast beautifully during baking. For best results, use high-quality chocolate chips (60% cacao) and standard-sized marshmallows—they toast more evenly than jumbo varieties.
Bake to Achieve the Perfect Crispy Top and Fudgy Center
Preheat your oven to 350°F and line an 8x8-inch baking pan with parchment paper, leaving an overhang for easy removal. Spread the batter evenly into the prepared pan, using a spatula to smooth the top. Bake for 25-30 minutes, or until the edges are set and the center still appears slightly underbaked—a toothpick inserted should come out with moist crumbs (not wet batter).
This is where the crispy promise is delivered: the edges should be golden brown and slightly crisp, while the center maintains its fudgy, dense texture. The marshmallows will begin to toast and puff, creating those irresistible crispy morsels on top. If your oven runs hot, start checking at the 22-minute mark—every oven behaves differently.
Finish with Dark Chocolate Drizzle for Professional Presentation
Remove the brownies from the oven and let them cool in the pan for 10 minutes before transferring to a wire rack to cool completely. While they cool, melt the 2 oz dark chocolate bars (70% cacao) in 30-second intervals in the microwave, stirring between each interval until smooth. Drizzle the melted chocolate over the cooled brownies in an attractive pattern, allowing it to set slightly before slicing.
The dark chocolate adds a sophisticated finish that complements the rich cocoa base. For extra flair, sprinkle a pinch of flaky sea salt on top just before serving—this enhances the chocolate flavors and creates a perfect balance of sweet, salty, and crispy textures. Cut into 16 equal squares for serving, ensuring each portion contains that perfect combination of fudgy center, crispy top, and toasted marshmallow pockets.
Pro Tips For Making Brownie Recipe With Chocolate Chips And Marshmallows
- STOP OVERMIXING THE BATTER: Mixing this batter until it’s smooth enough to pour is tempting, but you’ll end up with tough, cakey brownies instead of fudgy ones. Once the flour is just combined—think "streaks of dryness remain"—drop the spatula. The eggs and butter do most of the work here, and overworking them turns them into glue.
- MELT THE MARSHMALLOWS LAST: I used to fold them in early, thinking it’d distribute better, but they melt too fast and turn the whole batter into a sticky mess. Instead, melt them separately in a microwave-safe bowl (30-second bursts, stir between) until gooey but not liquid, then fold in just before baking. This keeps the texture light and the marshmallow pockets intact.
- USE ROOM-TEMP BUTTER: Cold butter creates pockets of steam that make your brownies dense and uneven. Take the butter out of the fridge 30–60 minutes before mixing—yes, even if you’re in a hurry. If you’re really pressed, microwave it for 10–15 seconds to soften, then let it sit for 2 minutes. The goal is "scoopable," not melted.
- BAKE UNTIL TOOTHPICK COMES OUT CLEAN-ISH: That "moist crumb" look you see in photos? It’s not raw batter. Pull the brownies when a toothpick comes out with a few moist crumbs (not wet batter). If you wait for "completely clean," you’ve overbaked—your brownies will be dry and crumbly. They’ll set further as they cool, so trust the "almost clean" rule.
Storing and reheating your leftovers
Room Temp Storage
Store your brownies at room temperature in an airtight container for up to 4 days. The flavors actually deepen overnight as the cocoa and marshmallows meld together. I like using glass Pyrex containers with snap-on lids—they keep the brownies fresh while preventing moisture loss.
Place a piece of parchment paper between layers if stacking to maintain crispiness. 🧈
Marshmallow Crispiness
The toasted marshmallows lose their crunch after 24 hours at room temperature. To restore that satisfying crunch, pop the brownies in a 350°F oven for 2-3 minutes—just until the marshmallows puff up again.
This quick reheat works perfectly for individual squares. For extra flair, sprinkle a pinch of flaky sea salt after reheating to enhance the sweet-salty contrast.
Freezer Magic
For longer storage, freeze brownies in airtight freezer bags or quart-sized containers for up to 3 months. I recommend portioning into individual squares before freezing—they thaw perfectly for quick treats.
When ready to enjoy, thaw at room temperature for 30 minutes or microwave for 10-15 seconds to restore the marshmallow crunch. The chocolate drizzle stays intact when frozen properly.
Microwave Revival
For single servings, microwave individual squares on 50% power for 8-10 seconds to warm through without drying out. The marshmallows soften slightly but maintain their texture. If your brownies seem dry after reheating, add a few drops of heavy cream and microwave for another 2-3 seconds.
This trick works wonders for restoring that perfect fudgy texture. 🍫
Oven Refresh
For a more even reheat, place brownies on a baking sheet and warm in a 300°F oven for 5-7 minutes. This gentle heat preserves the crispy edges while gently warming the fudgy center.
The marshmallows will puff up beautifully, giving you that restaurant-quality texture. I often use this method when serving to a crowd—it ensures every bite is perfect.
Chocolate Drizzle Care
The dark chocolate drizzle hardens at room temperature, so refrigerate briefly if needed before serving. To restore shine, place the brownies in a 200°F oven for 1 minute—this gently melts the chocolate just enough to create that glossy finish again.
Store leftovers with the drizzle-side down to protect the chocolate from drying out. The combination of warm brownies and melted chocolate is pure indulgence. ✨
Nutrition facts
Frequently asked questions
Why do your brownies need to be slightly underbaked?
The secret to perfect texture is that fudgy center! Underbaking by 1-2 minutes keeps the middle rich and moist while the edges crisp up. When you insert a toothpick, it should come out with moist crumbs—not wet batter. This ensures every bite has that signature gooey goodness.
Can I use regular marshmallows instead of mini ones?
Yes, but you'll need to adjust the baking time! Jumbo marshmallows take longer to toast properly—reduce your batch by 1 cup and bake for 32-35 minutes instead. Mini marshmallows toast more evenly and create those perfect crispy pockets. For best results, stick with standard mini marshmallows.
How do I prevent my brownies from cracking?
Cracking happens when the batter is too dry or the oven temperature fluctuates. First, make sure your butter is cold but not frozen when creaming. Second, don't overmix the batter—just fold until combined. Finally, bake on the middle rack for even heat distribution. A light crack is normal, but deep cracks mean the batter was too dry.
What's the best way to make these brownies extra fudgy?
For ultra-fudgy brownies, increase the cocoa powder to 0.85 cups and reduce the flour to 0.85 cups. Also, use 1/4 cup less sugar total. The key is the ratio—more cocoa and less flour creates that dense, melt-in-your-mouth texture. Just be sure to underbake by 1-2 minutes for maximum fudginess!
Can I substitute white chocolate chips for the semisweet?
You can, but the flavor will be sweeter and less rich. For best results, use 1 cup semisweet + 0.5 cup white chocolate chips to maintain balance. If you prefer all white chocolate, reduce the sugar by 0.25 cups to compensate for the extra sweetness. The marshmallow topping will still toast beautifully regardless of chocolate chip type.