I had some York patties leftover from Halloween and wanted to use them in some capacity. I turned to Pinterest and found this recipe — brownies + York patties? Yes yes yes, please! These are incredibly rich, so maybe cutting them into 1-inch squares would be the best way to go (instead of the giant brownies I created).
York Peppermint Patty Brownies
Recipe source: Jamie Cooks it Up 
1 cup butter
8 oz unsweetened chocolate
3-3/4 cups sugar
2 teaspoons vanilla
1/2 teaspoon salt
1/2 teaspoon almond extract
1-2/3 cups flour
1 cup semi sweet chocolate chips
2 bags York Peppermint Patties
7. Unwrap your peppermint patties and line them up over the top of the bottom layer of batter.
8. Cover the patties with the second half of the batter.
9. Bake at 425 for 23 minutes. [This part can be a little tricky. Stick a knife in the top layer of brownie and be sure that it comes out clean before you take them out of the oven.]
10. Cool on a wire rack and then refrigerate at least 6 hours.