Melt the chocolate in a double boiler over low heat, stirring occasionally until smooth; set aside.

In another medium bowl, combine the flour, cocoa, baking powder, and salt; set aside.

In a large mixing bowl, cream the butter and sugars until smooth.

Beat in the eggs and vanilla.

On low speed, add the melted chocolate and dry ingredients.

Stir in the chopped peanut butter cups.

Cover the mixing bowl and let stand (at room temperature) for 30-45 minutes so the chocolate will set up.

Preheat the oven to 350 degrees F. Spray a large sheet pan with nonstick cooking spray.

Roll the dough into a ball using a rounded tablespoon of dough and place the dough on the sheet pan 2-inches apart.

Bake the cookies 10-11 minutes. The cookies will be very soft in the middle but will set up when cooled.

Cool the cookies on the sheet pan for 5 minutes. Transfer to a cooling rack.

Remove from cooling rack and enjoy!