Go Back
+ servings
brownies with rainbow chips on top of a white plate
Print Recipe
5 from 1 vote

Cosmic Brownies

Fudgy cosmic brownies topped off with homemade chocolate ganache and rainbow chips. Super easy and made in under 30 minutes!
Prep Time5 mins
Cook Time20 mins
Total Time25 mins
Course: Dessert
Cuisine: American
Servings: 12 servings
Calories: 330kcal


  • 8 tbsp unsalted melted butter
  • 2 eggs
  • 1 cup granulated sugar
  • 1 tsp vanilla extract
  • 1/2 cup all-purpose flour
  • 1/4 cup unsweetened cocoa powder
  • 1 tbsp cornstarch
  • pinch of salt
  • 3 tbsp whole milk
  • 1/4 cup rainbow chips

Chocolate Ganache:

  • 1 cup semi-sweet chocolate chips
  • 1/2 cup milk chocolate chips
  • 1/2 cup heavy cream


  • Preheat oven to 350 degrees F.
  • Grease and line a 9x9 baking dish with parchment paper.
  • Sift the all-purpose flour, cornstarch, salt, and unsweetened cocoa powder, set aside.
  • In a large bowl, combine the melted butter, eggs, sugar, vanilla extract, and whole milk.
  • Add the sifted ingredients to the egg mixture and mix until well combined.
  • Place the brownie batter in the prepared baking dish.
  • Bake for 20 minutes.
  • Let the brownies cool completely before frosting.
  • To make the chocolate ganache, microwave the heavy cream for about 45 seconds. Keep an eye on it.
  • Pour the warm heavy cream over the semi-sweet chocolate chips and milk chocolate chips and let it sit for about 3 minutes.
  • Stir the chocolate ganache until smooth.
  • Pour the ganache over the brownies and then top the brownies off with rainbow chips.
  • Let the ganache set before slicing into them.
  • Enjoy with a cold glass of milk.



Make sure you use a 9x9 baking dish. Do not overmix the brownie batter.


Calories: 330kcal | Carbohydrates: 35g | Protein: 3g | Fat: 19g | Saturated Fat: 11g | Cholesterol: 63mg | Sodium: 24mg | Potassium: 140mg | Fiber: 2g | Sugar: 27g | Vitamin A: 450IU | Calcium: 37mg | Iron: 1.7mg