Peanut Butter Cookies

1/2 cup margarine
1/2 cup peanut butter
1 1/4 cups flour
1/2 cup sugar
1/2 cup brown sugar
1 egg
1/2 tsp soda
1/2 tsp baking powder
Extra sugar

Cream all ingredients together. Roll into 1 inch balls and roll in sugar. Flatten in a criss-cross pattern with a fork. Bake at 375 degrees for 7-9 minutes.