WOW!! Made these last night for a cooking party! Thank you. Pinned via Korie Parks: Preheat your oven to 350 degrees. Spray the insides of a square all edges brownie pan with Pam spray. Scoop out a heaping tablespoon of premade cookie dough and press into the bottom of each square. Top the cookie dough with a Reeses Peanut Butter Cup placed upside down. Then fill up the well with your favorite prepared brownie mix up to 3/4 full. Bake in oven for 15-18 minutes. Remove and cool slightly.