How I Make Homemade Cosmic Brownies 1. Preheat and Prep I preheat the oven to 350°F and line an 8×8-inch baking dish with parchment paper, leaving a bit of overhang on the sides for easy removal. 2.

Learn how to make this copycat cosmic brownie cupcakes recipe. The perfect treat that will remind you of the Little Debbie Brownie, a favorite childhood treat! Looking for a dessert that’s easy ...