Beat the granulated sugar, brown sugar, and creamy peanut butter for 2-3 minutes.
Add the egg, vanilla, and baking powder. Beat for 1-2 minutes.
Use a 1 tablespoon-sized dough scoop to scoop balls of dough. Roll into a smooth ball and coat with coarse sugar and place on parchment-lined baking sheets.
Bake at 350˚F for 8-10 minutes.
Remove from the oven and press a Hershey's Kiss into the center of each warm cookie.