They are also super easy to make. Simply bake your favorite brownies in a mini muffin tin. I used Duncan Hines box mix. Follow the instructions on the back of the box, and bake for 16 minutes. For half of the brownie bites, I placed half of a Hershey's dark chocolate candy on top immediately after removing the brownies from the oven. This allowed the heat of the brownies to melt the chocolate a bit. For the other half, I stirred in peanut butter chocolate chips. I don't know if you've seen them in the store, but they are a fun swirl chip, half peanut butter, half chocolate. You could also just leave the brownies plain, if that's your preference. I thought both versions I tried turned out super tasty.
While your brownies are cooling, whip up the peanut butter frosting. Beat together 1/2 cup softened butter with 2/3 cup peanut butter. Then, slowly add in 1 cup powdered sugar. Simply pipe that onto your brownies, top with a mini peanut butter cup, and you are good to go! Find a friend to share these with, or gorge yourself on them. Believe me, once you eat one, it's hard to stop.