Indulge in the nostalgia of childhood with this homemade cosmic brownie recipe. These fudgy, chocolatey treats will transport you back to lunchtime in the school cafeteria. Perfect for a sweet snack or dessert, these cosmic brownies are sure to be a hit with both kids and adults alike.

Preparation time: 15 minutes | Cooking Time: 20 minutes | Total Time: 35 minutes | Serves: 12


  • 1/2 cup unsalted butter
  • 1 cup granulated sugar
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • 1/3 cup cocoa powder
  • 1/2 cup all-purpose flour
  • 1/4 teaspoon salt
  • 1/4 teaspoon baking powder
  • 1/2 cup chocolate chips
  • 1/4 cup rainbow sprinkles


  1. Preheat the oven to 350°F and line an 8×8 inch baking pan with parchment paper.
  2. In a microwave-safe bowl, melt the butter. Stir in the sugar until well combined.
  3. Beat in the eggs and vanilla extract until smooth.
  4. Stir in the cocoa powder, flour, salt, and baking powder until just combined.
  5. Fold in the chocolate chips and pour the batter into the prepared pan.
  6. Sprinkle rainbow sprinkles on top and bake for 20 minutes, or until a toothpick inserted in the center comes out clean.
  7. Allow to cool before cutting into squares and serving.

Nutrition Information:

Calories: 220 || Carbohydrates: 30g || Protein: 3g || Fat: 10g || Sugar: 20g || Fiber: 2g

What I Love About This Recipe?

  1. The rich, fudgy texture of these brownies is irresistible.
  2. The addition of rainbow sprinkles adds a fun and colorful twist.
  3. They are easy to make and perfect for sharing with friends and family.
  4. This recipe brings back fond memories of childhood cosmic brownies.
  5. The perfect balance of sweetness and chocolate flavor.

What To Avoid While Making this Recipe?

  1. Avoid overmixing the batter, as this can lead to tough brownies.
  2. Do not overbake the brownies, as they will continue to cook slightly in the pan after removing from the oven.
  3. Be careful not to burn the chocolate chips when melting them with the butter.
  4. Ensure the eggs are at room temperature to prevent a gritty texture in the brownies.
  5. Avoid skipping the rainbow sprinkles, as they add a fun and decorative element to the brownies.

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