Mix:
½ cup shortening
½ cup peanut butter
½ cup sugar
½ cup brown sugar
1 egg

Sift together:
1 ½ cup flour
1 ½ teaspoon baking powder
¾ teaspoon baking soda
¼ teaspoon salt

Mix dry ingredients into shortening mixture and chill. Roll dough into balls and flatten criss-cross with the tines of a fork dipped in sugar. Bake 10 – 12 minutes at 375°.