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Cosmic Brownies Recipe

4.5 from 80 reviews

These Best Cosmic Brownies are rich, fudgy, and topped with a smooth chocolate ganache and colorful rainbow candy-coated chocolate chips for a nostalgic and vibrant treat. Perfectly baked to a chewy, slightly gooey texture, these brownies combine deep cocoa flavor with a creamy, glossy ganache, creating a delightful balance of chocolatey indulgence and fun crunch.

Ingredients

Scale

Brownie Base

  • 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 Topping

  • ¼ cup heavy cream
  • 4 oz semisweet chocolate (chopped)
  • Pinch of salt

Topping

  • 23 tbsp rainbow candy-coated chocolate chips (Wilton rainbow chips or similar)

Instructions

  1. Preheat and Prepare Pan: Preheat your oven to 350°F (175°C). Line an 8×8 inch baking pan with parchment paper to prevent sticking and for easy removal later.
  2. Melt Butter and Mix Sugars: In a medium saucepan over the stove, melt ½ cup of unsalted butter. Once melted, stir in ¾ cup granulated sugar, ¼ cup brown sugar, ½ cup Dutch-process cocoa powder, and ¼ tsp salt until the mixture is smooth and well combined.
  3. Incorporate Wet Ingredients: Transfer the cocoa mixture to a large bowl. Whisk in 1 tsp vanilla extract. Then, add 2 large room temperature eggs one at a time, beating after each addition until the batter becomes thick and shiny.
  4. Add Dry Ingredients: Gently fold in ½ cup all-purpose flour and 1 tbsp cornstarch until just combined, careful not to overmix for tender brownies.
  5. Bake Brownies: Spread 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.
  6. Remove Brownies from Pan: Once cooled, carefully flip the brownies out of the pan and peel away the parchment paper so the brownies are flat and smooth, ready for ganache topping.
  7. Prepare Ganache: Heat ¼ cup heavy cream in the microwave for 30 seconds until hot but not boiling. Pour the cream over 4 oz chopped semisweet chocolate and let it sit for 1 minute. Add a pinch of salt, then stir until smooth and glossy.
  8. Apply Ganache and Add Toppings: Spread the ganache evenly over the cooled brownies. Immediately sprinkle 2-3 tbsp rainbow candy-coated chocolate chips over the ganache while it’s still soft.
  9. Chill and Slice: Chill the brownies in the refrigerator for 1-2 hours, or until the ganache has set. For clean slices, wipe the knife between cuts.

Notes

  • This recipe yields 8 larger bars or 16 smaller squares depending on how you slice the brownies.
  • The nutrition facts are estimated based on slicing into 16 squares.
  • Make sure eggs are at room temperature to ensure proper batter texture.
  • Don’t overbake to maintain fudgy and gooey centers.
  • Use parchment paper for easier removal and cleaner edges.

Keywords: cosmic brownies, fudgy brownies, chocolate ganache brownies, rainbow chip brownies, easy dessert, homemade brownies