Description

These homemade Cosmic Brownies are rich, fudgy, and ultra-chewy, just like the ones you loved as a kid—only better! Topped with a silky chocolate ganache and colorful candy-coated chocolate chips, they bring the perfect mix of nostalgia and indulgence.

Ingredients

Scale

Brownie Base

10 tbsp unsalted butter, melted
1 cup granulated sugar
1/3 cup packed light brown sugar
3/4 cup + 2 tbsp unsweetened cocoa powder, sifted
2 large eggs + 1 egg yolk (for extra chewiness)
1 tbsp corn syrup (for a fudgy texture)
1/2 tsp vanilla extract
2/3 cup all-purpose flour
1 tbsp cornstarch
1/4 tsp salt

Chocolate Ganache Frosting

1/2 cup heavy cream
1 1/2 cups semisweet chocolate chips

Topping

1/4 cup rainbow candy-coated chocolate chips (or mini M&Ms)

Instructions

Preheat & Prep – Preheat oven to 350°F (175°C). Line an 8×8-inch metal baking pan with parchment paper.
Make the Batter – In a microwave-safe bowl, melt butter, then stir in granulated sugar, brown sugar, and cocoa powder until smooth. Let cool slightly.
Add Wet Ingredients – Mix in eggs, egg yolk, corn syrup, and vanilla extract until fully combined.
Incorporate Dry Ingredients – Gently fold in flour, cornstarch, and salt until just combined. Avoid overmixing.
Bake – Spread batter evenly into the pan and bake for 25 minutes, or until the edges are set and the center is slightly soft. Let cool completely.
Prepare Ganache – Heat heavy cream in the microwave for 1 minute until hot but not boiling. Pour over chocolate chips, let sit for 3 minutes, then stir until smooth.
Assemble & Chill – Spread ganache over cooled brownies and sprinkle with rainbow candy-coated chips. Refrigerate for 1-2 hours to set before slicing.

Notes

For extra chewy brownies, store them in the fridge and serve chilled.
Use a metal baking pan for best results—glass can cause uneven baking.
Swap rainbow chips for crushed peppermint, caramel drizzle, or peanut butter swirl for a fun twist.

Prep Time: 15 minutes
cooling: 10 minutes
Cook Time: 25 minutes
Category: Dessert
Method: Baking
Cuisine: American

Nutrition

Serving Size: 1 brownie
Calories: 290 kcal
Sugar: 26g
Sodium: 85mg
Fat: 14g
Saturated Fat: 8g
Unsaturated Fat: 5g
Trans Fat: 0g
Carbohydrates: 40g
Fiber: 2g
Protein: 3g
Cholesterol: 45mg

Keywords: Cosmic Brownies, homemade brownies, fudgy brownies, chewy brownies, chocolate ganache brownies, nostalgic desserts, Little Debbie brownies