Preheat oven to appropriate setting on the brownie box you purchase.
Spray brookie pan with nonstick spray.
Place an Oreo on each of the 6 brookie cavity spots.
Make boxed brownies in a mixing bowl.
Once the brownie mixture is complete, fill each brookie cavity, being careful to not move the cookie.
(I covered my cookie with batter FYI).
Bake brookie about 20 minutes (watch them, you don't want them to burn and oven temps vary).
Remove and allow them to cool. (15 minutes in the pan)
Once cooled remove from pan and allow to cook a bit longer. (45 minutes)
Working with each cooled brookie, use a cookie scoop and add a scoop of whipped topping.
Follow that with an eyeball, slanted (angled to the side).
Serve or refrigerate. (whipped topping).