Ingredients :

1/2 cup butter

1/2 cup peanut butter

1/2 cup sugar

1/2 cup brown sugar

1 egg

1/2 teaspoon vanilla

1 1/4 cups sifted flour

3/4 teaspoon baking soda

1/4 teaspoon salt

Directions :

Preheat oven to 375?. Mix first six ingredients. Add the rest of the ingredients. Mix well. Roll into balls and press down with a fork dipped in sugar or flour. Bake for 10-12 minutes on ungreased cookie sheet.

source :allrecipes.com