Preheat an oven to 375 degrees. Line cookie sheets with parchment paper.
Cream together sugars, peanut butter, shortening and butter on medium-high heat until light and fluffy.
Add the egg and mix thoroughly.
Stir in the flour, baking soda, baking powder, and salt.
Shape the dough into 1-1/4 inch balls. A 2 tsp cookie scoop will yield the perfect size cookies.
Place the balls on the parchment lined cookie sheets.
Pour the remaining 2 T sugar to a small plate. Dip the tines of a fork in the sugar and flatten the cookies in a crosscross pattern, re-dipping in the sugar between each cookie.
Bake for 9-10 minutes until lightly golden brown. Cool for 5 minutes on cookie sheet then transfer to a wire rack to cool completely.