Preheat oven to 350. In the bowl of an electric mixer (or hand mixer) cream the butter and sugars, 2-3 minutes until fluffy. Blend in the egg and vanilla, scraping the sides of the bowl if needed.
In a separate bowl, combine the flour, cocoa powder, baking soda and salt. Slowly add in the dry mix to the wet a little at a time until fully combined, scraping the sides.
Mix in the milk. Add the chocolate chips, peanut butter chips, and peanut butter cups, and mix until just combined.
Roll dough into 2 tablespoons sized balls, and place them on a parchment-lined baking sheet, 2 inches apart. Bake 9-12 minutes until they appear dry on the tops. Let cool completely on the baking sheet.
Peanut Butter Frosting:
In a large bowl, cream the butter with a hand mixer. Add the peanut butter and vanilla, mix well. Slowly add in the powdered sugar, alternating with the heavy cream.
Beat for 2-3 minutes until fluffy.
Sandwich Cookie Assembly:
Take one cookie and pipe frosting in a circle around the outside edge, place a peanut butter cup in the center. Top with another cookie, serve and enjoy!
This recipe can be doubled to serve more people or to sell at bake sales, etc.
Use Reese's Pieces in the cookies instead of chocolate and peanut butter chips.
You can use the Peanut Butter Cup in the center or leave it out, if you do I would suggest making some more frosting to ensure that they are filled.
Switch things up by changing the frosting in the center try a chocolate buttercream instead.
Reese's Sandwich Cookies Recipe found on https://thissillygirlskitchen.com/?p=16273 *All nutritional information is approximate and may not be 100% accurate. Please consult a nutritionist for more specific information.