Preheat your oven to 350 degrees. Line two baking sheets with parchment paper and set aside.

Cream together the shortening and peanut butter in the bowl of an electric mixer. Stir in 1/2 cup of sugar and the brown sugar. Add the baking powder, baking soda, egg, milk, vanilla, and flour. Stir to combine.

Shape the dough into one inch circles. Roll each mound in the 1/4 cup of sugar and place on your prepared sheet. Bake for 12 minutes, or until the edges are lightly browned.

Press a chocolate candy into the center immediately and cool on a wire rack.