Double Chocolate Marshmallow Brownie

Featured in: Sweet Comfort Bakes

This decadent brownie features a rich blend of cocoa and melted butter, combined with both semi-sweet and dark chocolate chunks for deep flavor. After baking, mini marshmallows are topped and baked until golden and puffed, adding a gooey, sweet layer. The batter balances sugar and vanilla for a moist, tender texture, perfect when served warm or cooled. Ideal for those craving a luscious, comforting chocolate dessert with a soft marshmallow finish.

Updated on Mon, 10 Nov 2025 14:50:00 GMT
Decadent double chocolate marshmallow brownie bake topped with fluffy, golden marshmallows.  Save to Pinterest
Decadent double chocolate marshmallow brownie bake topped with fluffy, golden marshmallows. | savoringli.com

A rich, fudgy brownie dessert loaded with chocolate chunks and topped with gooey marshmallows perfect for satisfying any sweet tooth.

I first served this to my family and everyone loved how gooey and chocolatey it was, perfect for dessert nights.

Ingredients

  • Dry Ingredients: 1 cup (125 g) all-purpose flour, 1/2 cup (50 g) unsweetened cocoa powder, 1/2 tsp baking powder, 1/2 tsp salt
  • Wet Ingredients: 1 cup (225 g) unsalted butter melted, 1 1/2 cups (300 g) granulated sugar, 1/2 cup (100 g) packed brown sugar, 3 large eggs at room temperature, 2 tsp pure vanilla extract
  • Chocolate & Extras: 3/4 cup (130 g) semi-sweet chocolate chips or chunks, 1/2 cup (85 g) dark chocolate chips or chopped chocolate, 2 cups (100 g) mini marshmallows

Instructions

Step 1:
Preheat the oven to 350°F (175°C) Grease and line a 9x13-inch (23x33 cm) baking pan with parchment paper
Step 2:
In a medium bowl whisk together the flour cocoa powder baking powder and salt Set aside
Step 3:
In a large bowl combine the melted butter granulated sugar and brown sugar Whisk until smooth
Step 4:
Add the eggs one at a time mixing well after each addition Stir in the vanilla extract
Step 5:
Gradually fold the dry ingredients into the wet mixture until just combined (do not overmix)
Step 6:
Fold in the semi-sweet and dark chocolate chips or chunks
Step 7:
Spread the batter evenly in the prepared pan Bake for 2225 minutes
Step 8:
Remove from the oven quickly scatter the mini marshmallows over the top and gently press them in
Step 9:
Return to the oven and bake for an additional 57 minutes until the marshmallows are puffed and golden
Step 10:
Let cool completely in the pan before slicing into squares
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| savoringli.com

Making this brownie has become a family tradition especially during holiday gatherings where kids eagerly wait for their slice

Notes

For extra decadence drizzle with melted chocolate after baking Swap dark chocolate for milk chocolate if you prefer a sweeter brownie Serve warm with a scoop of vanilla ice cream for an indulgent treat

Required Tools

9x13-inch (23x33 cm) baking pan Parchment paper Mixing bowls Whisk Rubber spatula Measuring cups and spoons

Allergen Information

Contains Wheat (gluten) eggs dairy (butter chocolate marshmallows may contain traces of milk)

Irresistible double chocolate marshmallow brownie bake, served warm with vanilla ice cream.  Save to Pinterest
Irresistible double chocolate marshmallow brownie bake, served warm with vanilla ice cream. | savoringli.com

This brownie bake is the ultimate chocolate lover's dream that never fails to impress.

Recipe Questions & Answers

How do I prevent the marshmallows from burning?

Bake the brownies first, then add the marshmallows and return to the oven for a shorter time at a slightly lower temperature to ensure they puff and brown gently without burning.

Can I substitute milk chocolate for dark chocolate in the batter?

Yes, swapping dark chocolate for milk chocolate will create a sweeter and creamier brownie flavor.

What is the best way to fold in the chocolate chunks?

Gently fold the chocolate chunks into the batter at the end to keep them evenly distributed without overmixing, preserving the brownie’s texture.

Should the brownies be cooled before cutting?

Allowing the brownies to cool completely in the pan helps them set properly, making for cleaner, more uniform squares when sliced.

Is it possible to make this dessert vegan-friendly?

Replacing butter with plant-based alternatives and using vegan marshmallows can adapt this dessert to a vegan diet.

How do the marshmallows affect the texture?

The marshmallows melt slightly and form a gooey, soft layer on top, contrasting with the dense, fudgy brownie beneath.

Double Chocolate Marshmallow Brownie

Fudgy brownie bursting with chocolate chunks and melted marshmallow topping for an irresistible treat.

Prep Time
20 minutes
Time to Cook
30 minutes
Overall Time
50 minutes
Created by savoringli Lila Anderson


Skill Level Easy

Cuisine Type American

Makes 12 Serving Size

Diet Details Vegetarian-Friendly

Ingredient List

Dry Ingredients

01 1 cup all-purpose flour
02 1/2 cup unsweetened cocoa powder
03 1/2 teaspoon baking powder
04 1/2 teaspoon salt

Wet Ingredients

01 1 cup unsalted butter, melted
02 1 1/2 cups granulated sugar
03 1/2 cup packed brown sugar
04 3 large eggs, at room temperature
05 2 teaspoons pure vanilla extract

Chocolate & Extras

01 3/4 cup semi-sweet chocolate chips or chunks
02 1/2 cup dark chocolate chips or chopped chocolate
03 2 cups mini marshmallows

Step-by-Step Instructions

Step 01

Prepare Oven and Pan: Preheat oven to 350°F. Grease and line a 9x13-inch baking pan with parchment paper.

Step 02

Combine Dry Ingredients: In a medium bowl, whisk together flour, cocoa powder, baking powder, and salt until well combined.

Step 03

Mix Wet Ingredients: In a large bowl, whisk melted butter, granulated sugar, and brown sugar until smooth.

Step 04

Incorporate Eggs and Vanilla: Add eggs one at a time to the wet mixture, beating well after each addition. Stir in vanilla extract.

Step 05

Combine Wet and Dry: Gradually fold the dry ingredients into the wet mixture until just combined, avoiding overmixing.

Step 06

Add Chocolate Chips: Fold in semi-sweet and dark chocolate chips or chunks evenly throughout the batter.

Step 07

Bake Initial Layer: Spread batter evenly in prepared pan and bake for 22 to 25 minutes.

Step 08

Add Marshmallow Topping: Remove pan from oven, scatter mini marshmallows over the surface, and gently press them into the batter.

Step 09

Finish Baking: Return to oven and bake an additional 5 to 7 minutes until marshmallows are puffed and golden.

Step 10

Cool and Serve: Allow to cool completely in the pan before cutting into 12 squares for serving.

Equipment Needed

  • 9x13-inch baking pan
  • Parchment paper
  • Mixing bowls
  • Whisk
  • Rubber spatula
  • Measuring cups and spoons

Allergy Info

Review every ingredient for allergens. If unsure, check with a healthcare provider.
  • Contains wheat (gluten), eggs, dairy (butter, chocolate, marshmallows may contain milk traces). Marshmallows may contain gelatin; check for vegetarian options.

Nutrition Info (per portion)

Serves for general info – not a replacement for professional advice.
  • Calorie Count: 320
  • Fats: 15 g
  • Carbohydrates: 45 g
  • Proteins: 3 g