Mix together dry ingredients together (flour, cocoa powder, baking powder, and salt) in a small bowl. Set it aside.

Unwrap your chocolate squares and melt in the microwave at 30 second intervals, until the mixture is smooth. Be careful not to burn the chocolate. Set it aside.

In another small bowl, whisk eggs, and then add vanilla. Set it aside.

Beat butter first, and then add both brown and granulated sugar. Add in the egg mixture and mix well.

Keeping your mixer on, add the melted chocolate and keep beating until well mixed. Then, add dry ingredients slowly, mixing well after each addition, and then add the chocolate chips. Do not overmix the dough.

Chill the dough in the fridge for at least 30 minutes and unwrap the peppermint patties in the meantime. Take one tablespoon of dough, squash the peppermint patty on top, and then put another tablespoon of dough on top. Flatten it slightly and set on a parchment-lined cookie sheet.

Bake in a preheated oven at 350 degrees F for 10 minutes. The centers will be rather soft, but they will finish cooking on the baking sheet.