Peanut Butter Cookies

from Joy of Cooking

2/3 cup butter softened
1 cup sugar
1 cup brown sugar
2 eggs
2 cups peanut butter
1 tsp vanilla
3 cups flour
1 tsp soda

Preheat oven to 375.  Mix butter, sugar, and brown sugar.  Add eggs, peanut butter, and vanilla.  Mix in flour and soda.  Roll in balls, and press flat.  Bake on lined cookie sheet 10-12 minutes.