Pre-heat the oven to 350°F and generously grease a regular size muffin tin.
Prepare the brownie mix according the package directions; set aside.
Separate the cookie dough into 12 even balls; squish them down into the bottom of each muffin cup.
Place a Reese’s peanut butter cup upside down on top of the cookie dough.
Evenly distribute the brownie batter on top of each peanut butter cup until the wells are about 90% full.
Place in the pre-heated oven and bake for 18 – 20 minutes or until the brownie batter is cooked through.
Remove from the oven and allow them to cool for about 5 minutes before removing from the pan.
