Chocolate Chip Cookie Peanut Butter Cup Brownies 1. Into the wells of a muffin tin (or in cupcake papers) flatten a square of store-bought chocolate chip cookie dough. 2. Top that with a Reese peanut butter cup (or a mini). 3. Prepare box-mix brownie batter (as directed on the box) and spoon it over Reese-cookie dough, 3/4 full. 4. Bake at 350 for 20 minutes. VOILA!