If you grew up in the ’90s, then you’ll likely have fond memories of finding a Little Debbie dessert tucked inside your school lunch bag. It was a good day when I found a Star Crunch, Oatmeal Creme Pie or Cosmic Brownie (thanks, Mom!). If you’re up for a fun time in the kitchen, then try your hand at a homemade version of Cosmic Brownies. I did, and I have zero regrets.
How to Make Copycat Cosmic Brownies
- 1/3 cup butter, softened
- 1 cup sugar
- 1 teaspoon vanilla extract
- 3 large egg whites, room temperature
- 2/3 cup all-purpose flour
- 1/2 cup baking cocoa
- 1/2 teaspoon baking powder
- 1/4 teaspoon salt
- Wilton Rainbow Crunch Sprinkles
- 3 to 4 teaspoons hot water
- 1/4 teaspoon vanilla extract
- 2 tablespoons baking cocoa
- 2/3 cup confectioners’ sugar
Step 1: Cream and Mix
Preheat your oven to 350° and then spray an 8-in. square baking pan with cooking spray. I recommend doing this towards the sink or an opened dishwasher so the spray doesn’t get everywhere. Then, cream the butter and sugar until it’s light and fluffy. Beat in the vanilla and egg whites, one at a time. I typically separate egg whites in the shell, but if that makes you too nervous, try these other methods for separating eggs.
Next, whisk together the flour, cocoa, baking powder and salt in a separate bowl. Gradually add that to the creamed mixture.
Step 2: Bake and Wait
Pour the batter (it will be thick) into an 8-in. square baking pan. Bake for 20-25 minutes, until a toothpick inserted in the center comes out clean. My oven runs a little cooler so I had to keep them in there for 3 extra minutes. Once the cosmic brownies are ready to come out, place the pan on a wire rack and let them cool completely. While you’re waiting for the brownies to cool, find out if Little Debbie was a real person or not.
Step 3: Glaze and Spread
When the brownies are completely cool, it’s time for the glaze. Mix the hot water, vanilla and cocoa. Gradually beat in the confectioners’ sugar. When the glaze is smooth and glossy, pour it onto the cooled brownies. You may need to use a spatula to spread it out. Then, top it off with a healthy dose of rainbow sprinkles (that’s my favorite part!).
Finally, cut into rectangles 1-1/2×3 inches long. Score the center so you can break off two pieces, just like you use to do with the original Cosmic Brownies. AH, this takes me back. But I have to admit, I like this homemade version better!
Note: Every product is independently selected by our editors. If you buy something through our links, we may earn an affiliate commission.