|Mix together shortening, peanut butter, sugar, brown sugar, and egg. In another bowl sift together flour, baking powder, baking soda, and salt. Mix the two bowls together gradually.|
Chill dough, roll into balls the size of large walnuts. Place 3 inches apart on lightly greased baking sheet. Flatten with fork dipped in flour or sugar -- crisscross.
Bake until set but not hard in 350 degrees oven for 10-12 minutes. Makes about 3 doz. 2 1/2 inch cookies.