Peanut Butter Cookies 1 cup flour1/2 tsp baking soda1/4 tsp salt1/4 cup butter or margarine1/4 cup peanut butter1/4 cup granulated sugar1/4 cup packed brown sugar1 egg1/2 tsp vanilla Pre-heat oven to 375 F.In a large mixing bowl blend together the flour, baking soda and salt.In another large mixing bowl cream together