1 box of brownies (and ingredients needed to make them)
9 snack sized York Peppermint Patties, unwrapped
Mix brownies according to directions. Pour a thin layer of brownie mix in the bottom of of 9 x 9 pan. Place York Peppermint Patties in a single layer on top of brownie mix. Cover with remaining brownie mix. Bake according to brownie directions.
Note: You may end up with a bubble of air around the patties when they cook.