Copycat Cosmic Brownies
Recipe type: Brownies, Bars
Prep time: 
Cook time: 
Total time: 
Serves: 24
Little Debbie's Cosmic Brownies were a huge part of my childhood and this copycat version brought back so many memories! They're simple to make and taste identical to the prepackaged brownies with the same fudgy texture and thick chocolate ganache. You won't be able to resist!
  • ¾ cup (1 & ½ sticks) butter, room temperature
  • 1 cup sugar
  • ⅔ cup brown sugar
  • 2 eggs
  • 3 Tbsp heavy cream or milk
  • 2 tsp vanilla extract
  • ½ tsp baking powder
  • 1 Tbsp cornstarch
  • Pinch salt
  • 1 & ¼ cup all-purpose flour
  • ¾ cup unsweetened cocoa powder
  • 1 cup semi-sweet chocolate chips
  • ½ cup milk chocolate chips
  • ½ cup heavy cream
  • Rainbow-Covered Chips or Mini M&M's, for garnish
  1. Preheat oven to 350 degrees F. Liberally grease a 13x9" baking pan with cooking spray and set aside.
  2. In a large bowl, cream together the butter, sugar and brown sugar with a handheld electric mixer until creamy. Beat in the eggs, one at a time, followed by the cream/milk and the vanilla. Meanwhile, in a separate large bowl, whisk together the flour, cocoa powder, baking powder, cornstarch and salt to combine.
  3. Gradually add the flour mixture into the butter mixture until a soft yet thick batter forms. The batter will be very thick! Spread the batter evenly into the prepared pan using a greased rubber spatula to help keep it even. Bake for approx. 15-18 minutes or until the top is shiny and appears set. Do NOT over-bake! The brownies may appear slightly undone, but they will continue to set more as they cool. Cool the brownies completely in the pan.
  4. Once the brownies are cooled, make your fudge ganache. In a microwaveable bowl, combine the semi-sweet and milk chocolate chips and the heavy cream. Microwave for about 1 minute on HIGH power, then stir vigorously (careful not to burn yourself) to help melt the remaining chocolate clusters. Once the ganache is smooth, pour it over top of the brownies in an even layer. Immediately top with the rainbow covered chips.
  5. Allow the fudge ganache to set briefly, about 15 minutes, before cutting into squares. Serve!
  6. NOTE: You can find the authentic Cosmic Brownies Rainbow Chips at craft stores like Michael's, Jo-Ann, etc. They're Wilton Brand.
Recipe by The Domestic Rebel at