These brownies rock!! I've had this recipe for a long time, and the original recipe actually calls for 1 1/2 c. MELTED butter or margarine. I prefer to use butter, so this may help to alleviate the sticking on the bottom of the pan. Also, I usually push the peppermint patties into the first layer of mixture, then top with the rest, so they won't poke through in cooking. Other than that, this is a good time, and I hope this helped!! :)