Desserts
This brownie, marshmallow, and Rice Krispies recipe delivers the ultimate dessert trifecta—rich chocolate brownie, gooey marshmallow layer, and crispy Rice Krispies topping.
The secret lies in baking the brownie base perfectly at 350°F for a fudgy yet sturdy foundation, then carefully layering the marshmallow and Rice Krispies mixture before baking again to create a crispy, golden crust.
What sets this triple-layered treat apart is the balance of textures—fudgy brownie at the bottom, creamy marshmallow in the middle, and crunchy Rice Krispies on top. The recipe ensures each layer stays distinct while coming together as one decadent dessert, perfect for parties or satisfying cravings.
Dusting with powdered sugar and adding a chocolate drizzle elevates the presentation to restaurant-worthy levels.
Ingredients for brownie marshmallow rice krispies
Rich chocolate brownie base meets gooey marshmallow and crispy Rice Krispies for a showstopping dessert trifecta.
| Ingredient | Amount | Notes |
|---|---|---|
| Unsalted Butter 🧈 | 1 cup | Cold, cubed for brownie |
| Granulated Sugar 🍚 | 2 cups | Superfine preferred for smoothness |
| Unsweetened Cocoa Powder 🍫 | ¾ cup | Natural or Dutch-processed |
| All-Purpose Flour 🌾 | ¾ cup | Sifted for light texture |
| Large Eggs 🥚 | 2 whole | Room temperature for even mixing |
| Vanilla Extract 🌿 | 1 tbsp | Pure, high-quality extract |
| Salt 🧂 | ½ tsp | Diamond Crystal preferred |
| Miniature Marshmallows 🧸 | 16 oz | Standard size, not jumbo |
| Rice Krispies Cereal 🍚 | 4 cups | Original, not honey-sweetened |
| Melted Butter 🧈 | ½ cup | For marshmallow layer |
| Powdered Sugar 🍚 | ½ cup | For dusting and drizzle |
| Semi-Sweet Chocolate Chips 🍫 | ½ cup | For decorative drizzle |
The cocoa powder is non-negotiable—Hershey's Special Dark or Dutch-processed for that velvety finish. Ghirardelli is my go-to for bulk purchases, but any high-quality brand works. For the Rice Krispies, original flavor is essential—skip the honey-sweetened or caramel varieties. The marshmallows? Joy of Cooking brand has the perfect size and melt consistency. Butter quality matters too: Land O'Lakes unsalted is my standard, but European-style butter adds extra richness if you're feeling fancy.
No vanilla extract? Seeds from a vanilla bean steeped in warm water works beautifully, though it's pricier. Short on cocoa powder? Melted dark chocolate at 1:1 ratio replaces half the amount, but texture may vary slightly. For the marshmallow layer, mini marshmallows are ideal, but standard size can be chopped into smaller pieces. The chocolate chips for drizzling can be swapped for chocolate-covered espresso beans for a gourmet twist. Always sift your flour and cocoa powder—this makes all the difference in texture.
Store the assembled dessert in an airtight container at room temperature for up to 3 days, though it's best enjoyed fresh. The brownie layer keeps well for 4 days separately if you're prepping ahead. For the marshmallow-Rice Krispies topping, assemble it just before baking to maintain crispness. Leftovers? Freeze individual slices for up to 2 months—they thaw beautifully with a quick warm in the oven.
Why You'll Love This Recipe
- No Melted Mess: I’ve burned enough Rice Krispie treats to know this is different—just melt the butter and sugar together, then fold in the brownie batter. No overcooking, no sticking, just that perfect crispy-squishy texture every time.
- Chocolate-Caramel Magic: That first bite of gooey marshmallow with rich cocoa and a hint of buttery brownie? It’s like dessert and snack food had a baby. Honestly, I’ve never met a bowl of these that wasn’t emptied in one sitting.
- Party in a Box: Make a big batch and watch it disappear at gatherings—no one will guess it’s basically a deconstructed s’more. (Yes, even on a Tuesday night, my kids beg for seconds.)
- Pantry Staple Power: Five ingredients, all of which you probably already own. No fancy substitutions needed—just butter, sugar, cocoa, flour, and eggs. Budget-friendly? Absolutely. Time-saving? Even more so.
Step-by-step instructions for triple-layered brownie dessert
Here's how to build this decadent dessert with perfect texture in each layer.
Prepare the Brownie Base
Preheat your oven to 350°F and line a 9x13-inch baking dish with parchment paper, leaving an overhang for easy removal. In a large mixing bowl, melt the 1 cup unsalted butter over low heat or in a microwave-safe bowl in 30-second intervals, stirring until completely smooth. Let it cool slightly—it should be warm but not hot to the touch.
Add the 2 cups granulated sugar and whisk vigorously until fully combined and the mixture becomes slightly thickened. This step ensures a smooth, fudgy texture. Sift in the 0.75 cup unsweetened cocoa powder and 0.75 cup all-purpose flour, then add the 2 whole large eggs, 1 tablespoon vanilla extract, and 0.5 teaspoon salt. Mix on low speed until just combined—you should still see small streaks of flour. Overmixing develops gluten and makes the brownies tough.
Bake the Brownie Layer
Spread the brownie batter evenly into the prepared baking dish. Tap the dish gently on the counter to remove any air bubbles. Bake for 20-25 minutes until a toothpick inserted in the center comes out with moist crumbs (not wet batter). The edges should be set but the center should still look slightly underdone—it will continue cooking as it cools.
Remove from the oven and let it cool completely in the pan for 30 minutes before proceeding. This cooling step is critical—it prevents the marshmallow layer from melting too quickly when added. While the brownie cools, prepare the marshmallow mixture to save time later.
Assemble the Marshmallow Layer
In a large microwave-safe bowl, melt the 16 ounces miniature marshmallows and 0.5 cup melted butter together in 30-second intervals, stirring between each interval until fully melted and smooth. The mixture should be thick and glossy—like warm caramel. If it's too thin, let it cool slightly to thicken naturally.
Spread the marshmallow mixture evenly over the completely cooled brownie layer, using a spatula to create an even, smooth surface. This layer should be about ¼-inch thick. Immediately sprinkle the 4 cups rice krispies cereal evenly over the marshmallow layer, pressing down gently to help them adhere. This step creates the signature crispy texture that contrasts perfectly with the gooey marshmallow.
Chill and Add Final Touches
Refrigerate the assembled dessert for at least 2 hours or until completely firm. This chilling step is essential—it sets the marshmallow layer and allows all the flavors to meld together. While it chills, melt the 0.5 cup semi-sweet chocolate chips in a microwave-safe bowl in 20-second intervals, stirring between each interval until smooth.
Once chilled, remove the dessert from the refrigerator and dust the top generously with the 0.5 cup powdered sugar using a fine-mesh sieve. Drizzle the melted chocolate chips evenly over the top, allowing it to drip slightly down the sides for visual appeal. Cut into 8 equal squares and serve immediately or store covered in the refrigerator for up to 3 days.
Pro Tips For Making Brownie Marshmallow Rice Krispies
- Melt Butter Slowly: I learned this the hard way—dumping cold butter into hot sugar makes it seize up like glue. Instead, melt the butter first (no need to brown it) and let it cool just until it’s warm to the touch before mixing with the sugar. This keeps your brownie base smooth, not grainy.
- Sift That Cocoa: Unsweetened cocoa powder is a powder for a reason—it clumps like a stubborn toddler if you don’t sift it. Use a fine-mesh sieve to break up any lumps before mixing it into the wet ingredients. Trust me, your Rice Krispies treat will thank you with a richer, silkier texture.
- Don’t Overmix the Batter: Once you fold in the Rice Krispies and marshmallows, stop stirring the second everything is coated. Overmixing turns your gooey masterpiece into a dense, chewy brick. A few gentle folds are all it takes—your treat should hold its shape when pressed, not ooze everywhere.
- Use Room-Temp Eggs: Cold eggs make your brownie mixture fight you. Let your eggs sit out for 30 minutes before cracking them into the batter. They’ll blend in smoothly, giving you a denser, fudgier brownie base that won’t crack when you cut it later. (Yes, even if you’re impatient like me.)
Flavor customization for these flavors
Sweet vs. Salty
Balance the classic sweetness with a salty twist by adding ½ teaspoon flaky sea salt (like Maldon) to the marshmallow layer before sprinkling the Rice Krispies. This enhances the caramelized flavor when baked, creating a sophisticated contrast.
For an extra kick, fold ¼ cup chopped toasted pecans into the marshmallow mixture—just toast them in a dry pan for 2-3 minutes until fragrant. 💫
Spiced Variations
Infuse warmth by adding ½ teaspoon cinnamon and ¼ teaspoon cayenne pepper to the brownie batter for a subtle spicy kick. For the marshmallow layer, swap ½ cup of the marshmallows with white chocolate marshmallows (like Dandies) for a creamy, vanilla-forward flavor.
A pinch of espresso powder in the brownie batter deepens the chocolate notes without bitterness.
Nutty Crunch
Swap out half the Rice Krispies for crushed pretzels (about 2 cups) to add a salty crunch that pairs perfectly with the sweet layers.
For a richer nutty flavor, replace the Rice Krispies entirely with crushed graham crackers and chopped walnuts, then toast them lightly in the oven for 5 minutes at 350°F before pressing onto the marshmallow layer. 🌟
Fruity Surprises
Add freshness by folding ½ cup diced strawberries or raspberries into the marshmallow layer—just toss them with the melted marshmallows and butter before spreading. For a tropical twist, mix in ¼ cup crushed pineapple (drained well) and a splash of lime zest into the brownie batter.
The acidity brightens the chocolate flavor beautifully.
Boozy Upgrades
Enhance the brownie layer with 1 tablespoon bourbon or dark rum, added alongside the vanilla extract. For the marshmallow layer, stir in 1 tablespoon orange liqueur (like Cointreau) for a citrusy depth.
A drizzle of chocolate-hazelnut spread (like Nutella) instead of plain chocolate chips adds a luxurious, nutty finish that guests will love. ✨
Nutrition facts
Frequently asked questions
Can I make this dessert in individual servings instead of one big pan?
Use 6-inch round cake pans or ramekins to create single-serving versions. Bake the brownie layer in the pans for 15-18 minutes at 350°F, then follow the same marshmallow-Rice Krispies assembly process in each. Chill for 1 hour before adding the final powdered sugar and chocolate drizzle. These mini versions are perfect for parties or portion control!
Why did my Rice Krispies layer get soggy instead of crispy?
This usually happens if the brownie layer wasn't fully cooled before adding the marshmallow mixture. Always let the brownie cool completely (30+ minutes) to prevent melting. Also, make sure your marshmallow mixture is thick enough—if it's too runny, it will soak into the Rice Krispies instead of creating a crispy crust. Chill the assembled dessert for the full 2 hours before cutting too!
Can I substitute regular marshmallows for mini marshmallows?
Yes, but you'll need to chop 12 large marshmallows into small pieces to replace the 16 oz mini marshmallows. Large marshmallows melt differently and may create uneven texture in the final dessert. For best results, use a food processor to pulse them into uniform ½-inch pieces before melting. The mini marshmallows are ideal because they melt more evenly and create a smoother layer.
How do I store leftovers without making the Rice Krispies lose their crunch?
Store the assembled dessert in an airtight container at room temperature for up to 2 days, or refrigerate for 3 days. To revive the crunch, warm slices at 300°F for 2-3 minutes before serving. For longer storage, freeze individual portions wrapped tightly in plastic wrap—thaw at room temperature for 1 hour before warming. Never store the marshmallow-Rice Krispies topping separately from the brownie base.
Can I make this dessert gluten-free?
Yes! Replace the all-purpose flour with a 1:1 gluten-free baking flour blend (like Bob's Red Mill) and ensure your cocoa powder is certified gluten-free. For the Rice Krispies layer, use gluten-free cereal like Rice Chex or gluten-free corn puffs. The brownie texture may be slightly denser, so bake it for 1-2 minutes longer than called for in the recipe. Always check labels to avoid cross-contamination with gluten-containing products.