The Best Cosmic Brownies Recipe
Introduction
These Cosmic Brownies are rich, fudgy, and topped with a smooth chocolate ganache sprinkled with colorful candy-coated chocolate chips. They bring a fun twist to classic brownies, perfect for special occasions or a delightful treat any day.

Ingredients
- ½ cup unsalted butter
- ¾ cup granulated sugar
- ¼ cup brown sugar
- ½ cup Dutch-process cocoa powder
- ¼ tsp salt
- 1 tsp vanilla extract
- 2 large eggs (room temperature)
- ½ cup all-purpose flour
- 1 tbsp cornstarch
- ¼ cup heavy cream
- 4 oz semisweet chocolate, chopped
- Pinch of salt
- 2–3 tbsp rainbow candy-coated chocolate chips (such as Wilton rainbow chips)
Instructions
- Step 1: Preheat your oven to 350°F (175°C) and line an 8×8 inch pan with parchment paper for easy removal.
- Step 2: In a medium saucepan, melt the butter over low heat. Stir in granulated sugar, brown sugar, cocoa powder, and salt until the mixture is smooth and well combined.
- Step 3: Transfer the mixture to a large bowl. Whisk in vanilla extract, then add eggs one at a time, beating well after each addition until the batter is thick and shiny.
- Step 4: Gently fold in the all-purpose flour and cornstarch until just combined—do not overmix.
- Step 5: Spread the batter evenly into the prepared pan. Bake for 20 to 22 minutes, or until the edges are set and the center still has a slight jiggle. Allow to cool completely in the pan.
- Step 6: Once cooled, flip the brownies out of the pan and peel off the parchment paper. This will expose a flat, clean surface for the ganache.
- Step 7: To make the ganache, heat the heavy cream in the microwave for about 30 seconds until hot but not boiling. Pour it over the chopped semisweet chocolate and add a pinch of salt. Let sit for 1 minute, then stir until smooth and glossy.
- Step 8: Spread the ganache evenly over the cooled brownies.
- Step 9: Sprinkle the rainbow candy-coated chocolate chips on top of the ganache while it is still soft.
- Step 10: Chill the brownies in the refrigerator for 1 to 2 hours to set the ganache. Use a clean, wiped knife between cuts for neat slices.
Tips & Variations
- Use room temperature eggs to ensure the batter emulsifies well and results in a shiny, thick texture.
- Swap out the semisweet chocolate for milk or dark chocolate depending on your sweetness preference.
- For an extra fudgy texture, try adding a tablespoon of espresso powder to the batter to enhance the chocolate flavor.
- Use different types of colorful toppings like crushed candy, nuts, or mini marshmallows for variety.
Storage
Store leftover brownies in an airtight container in the refrigerator for up to 5 days. Let them come to room temperature before serving or enjoy them chilled. The ganache topping will keep nicely refrigerated without losing its smooth texture.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I make these brownies gluten-free?
Yes, substitute the all-purpose flour with a gluten-free baking blend of equal measure. Ensure your cocoa powder and other ingredients are also gluten-free.
How do I get a shiny and thick brownie batter?
Beating the eggs well after adding them to the sugar and butter mixture creates a thick, shiny batter texture that leads to fudgy brownies.
PrintThe Best Cosmic Brownies Recipe
Indulge in these decadent Cosmic Brownies featuring a rich, fudgy base topped with a smooth chocolate ganache and colorful rainbow candy-coated chocolate chips for a fun, festive touch. Perfectly baked to achieve a slightly gooey center with set edges, these brownies offer a delightful mix of textures and vibrant flavors that are sure to satisfy any chocolate lover’s cravings.
- Prep Time: 15 minutes
- Cook Time: 22 minutes
- Total Time: 2 hours 37 minutes
- Yield: 16 brownies 1x
- Category: Dessert
- Method: Baking
- Cuisine: American
Ingredients
Brownie Ingredients
- ½ cup unsalted butter
- ¾ cup granulated sugar
- ¼ cup brown sugar
- ½ cup Dutch-process cocoa powder
- ¼ tsp salt
- 1 tsp vanilla extract
- 2 large eggs (room temperature)
- ½ cup all-purpose flour
- 1 tbsp cornstarch
Ganache Ingredients
- ¼ cup heavy cream
- 4 oz semisweet chocolate (chopped)
- Pinch of salt
Topping
- 2–3 tbsp rainbow candy-coated chocolate chips (Wilton rainbow chips or similar)
Instructions
- Preheat and Prepare Pan: Preheat your oven to 350°F and line an 8×8 inch baking pan with parchment paper for easy removal.
- Make Brownie Base: In a medium saucepan over the stove, melt the unsalted butter. Stir in granulated sugar, brown sugar, Dutch-process cocoa powder, and salt until the mixture is smooth and well combined.
- Add Eggs and Vanilla: Transfer the mixture to a large bowl. Whisk in vanilla extract, then add eggs one at a time, beating thoroughly after each addition until the batter is thick and shiny.
- Incorporate Dry Ingredients: Gently fold in the all-purpose flour and cornstarch until just combined to avoid overmixing.
- Bake the Brownies: Pour the batter evenly into the prepared pan. Bake for 20–22 minutes, or until the edges are set but the center still has a slight jiggle. Remove from oven and let cool completely in the pan.
- Prepare for Ganache: Once cooled, flip the brownies out of the pan and peel off the parchment paper to create a flat surface for the ganache.
- Make Ganache: Heat the heavy cream in the microwave for about 30 seconds until hot but not boiling. Pour over the chopped semisweet chocolate and add a pinch of salt. Let sit for 1 minute, then stir gently until smooth and glossy.
- Apply Ganache: Spread the ganache evenly over the flat side of the cooled brownies.
- Add Toppings: While the ganache is still soft, sprinkle the rainbow candy-coated chocolate chips evenly over the surface for a colorful, festive look.
- Chill and Serve: Refrigerate the brownies for 1–2 hours to set the ganache before slicing. For clean edges, wipe the knife between cuts.
Notes
- Use Dutch-process cocoa powder for a richer chocolate flavor and smoother texture.
- Ensure eggs are at room temperature for better batter emulsification.
- Do not overbake brownies; a slight jiggle in the middle ensures a fudgy texture.
- Chilling the ganache before slicing helps achieve clean cuts.
- Feel free to substitute rainbow candy chips with any colorful candy or chocolate chips you prefer.
Keywords: Cosmic brownies recipe, fudgy brownies, chocolate ganache brownies, rainbow brownies, festive dessert, easy brownies, homemade brownies

