Peanut Butter Cookies
["1 c. margarine", "1 c. peanut butter", "1 c. sugar", "1 c. firmly packed brown sugar", "2 eggs", "1 tsp. vanilla", "2 1/2 c. unsifted flour", "1 tsp. baking powder", "1 tsp. baking soda", "1 tsp. salt"]
["In a bowl with mixer at medium speed, beat first 6 ingredients until fluffy.", "At low speed beat in next 4 ingredients.", "Shape into 1-inch balls and roll in sugar.", "Place 2 inches apart on ungreased cookie sheet.", "Bake at 350\u00b0 for 12 to 15 minutes."]
["margarine", "peanut butter", "sugar", "brown sugar", "eggs", "vanilla", "flour", "baking powder", "baking soda", "salt"]