I first saw the brownie-mint patty combination in a Maida Heatter cookbook. She put a layer of mint patties between the brownie mixture and, since I enjoy the mint-chocolate combination, it sounded quite delicious.
Fast-forward a few years and and I have finally gotten around to making a similar version using plain old Coolmints. I would have bought the suggested York Peppermint Pattie Bites had I read the recipe through completely. No worries though - I just chopped them up, followed the directions and was rewarded with a chewy, minty brownie.
I liked how some of the pieces held their shape and provided a nice contrast to the brownie dough. I did end up with a thin layer of mint filling covering the bottom of the brownies which was not a problem at all when it came to getting eaten. These brownies formed a nice thin crackly top and were best eaten once they were completely cool. (They are fragile otherwise.)
Enjoy with some cold milk, or turn them into brownie sundaes as Dorie suggests. Either way, this is one super-cool treat!