1/2 cup shortening
1/2 cup peanut butter
1/2 cup sugar
1/2 cup brown sugar
1 extra-large egg
1 1/4 cups sifted flour
2/4 tsp baking soda
1/2 tsp baking powder
1/4 tsp salt

Cream shortening and peanut butter until blended; gradually add sugars; beat until fluffy.
Add egg and beat thoroughly.
Sift remaining ingredients together; divide in half and add to creamed mixture, one at a time, mixing till well blended after each addition.
Shape dough into 1 1/4-inch balls and place 3 inches apart on lightly greased cookie sheets.
Flatten with a fork by making a criss-cross pattern.
Bake at 375 degrees F for about 10 minutes.

(makes about 3 dozen)