I made this frosting for my mom's birthday. I put it on chocolate cupcakes. I was not crazy about the chocolate cupcake recipe I used, it was way too dry and more like a chocolate muffin than a cake, but I will be trying again. Next time I am going to try a new recipe and make the chocolate cupcakes with a mini peanut butter cup in the middle and then top it with this frosting! The frosting will be enough for about 16 cupcakes.
1/2 cup peanut butter
5 Tbsp softened unsalted butter
1 cup powdered sugar
1-3 Tbsp milk (only needed to thin, if desired)
Beat butters together with an electric mixer. Add sugar, thin with milk if you would like a thinner consistancy.