1. Mix brownies according to package directions. Spray your brownie pop pan liberally with cooking spray and fill each cavity 2/3 full of brownie mix. Bake 18-20 minutes. Let cool for about 10 minutes before removing from pan. Cool completely before dipping. (Note: the entire brownie mix makes about 24 brownies using this pan, meaning three trips through the oven.)
Melt your chocolate and peanut butter melts in separate bowls. Dip each lollipop stick into a little bit of melted chocolate and then press into the top of each brownie bite.
Transfer your melted chocolate into a zip-top sandwich bag. Snip off a small corner of the bag and use it to drizzle stripes down the sides of the brownie bite. Repeat with peanut butter melts.
Chill until hardened. Serve with Witches’ Hats.