Pre-heat oven to 375 degrees.
With a mixer, mix shortening, peanut butter, sugars and egg thoroughly.
Blend together the flour, baking powder, baking soda and salt.
Add the dry ingredients into the wet ingredients. Mix well.
Chill until firm.
Roll into balls the size of large walnuts and roll into additional sugar.
Place 3 inches apart on lightly greased baking sheet.
Flatten with fork in crisscross pattern.
Bake 10 to 12 minutes. Do not over bake.