Prepare a small cookie sheet by lining with parchment paper.
Gently twist 6 of the Oreos apart.
Sandwich one peanut butter cup in between the two halves of each Oreo.
In a microwave safe dish, melt together 1 cup of semisweet chocolate chips and 1 teaspoon of the coconut oil.
Once melted and smooth, use a fork to carefully dunk each of the Oreo Reese's sandwiches into the chocolate. Gently tap the bottom of the fork holding the dipped cookie against the edge of the bowl to help the excess chocolate drip off, then place the cookie onto the prepared parchment lined cookie sheet.
When all of the cookies have been dunked, let the cookies cool completely until hardened, either on the counter or in the fridge.
Melt ¼ cup of the semi-sweet chocolate chips with ¼ teaspoon of coconut oil in the microwave then spoon into a second piping bag fitted with a small open tip, or without a tip and just snip the end off. Pipe a zig-zag style drizzle of the melted chocolate onto the top of each cookie, let harden a bit.
Melt the peanut butter chips in the microwave then spoon into a piping bag fitted with a small open tip, or without a tip and just snip the end off. Pipe a zig-zag style going the opposite direction with the melted peanut butter chips. Let harden before serving.
Let harden before serving.