Peanut Butter Cookies
["1/2 c. butter or margarine", "1/2 c. granulated sugar", "1/2 c. brown sugar", "1 egg", "1/4 tsp. salt", "1/2 c. peanut butter", "1 1/2 c. flour", "3/4 tsp. baking soda", "1/2 tsp. baking powder"]
["Cream butter and sugars.", "Add egg.", "Add peanut butter and dry ingredients.", "Roll into 1-inch balls.", "Crisscross with wet fork. Bake at 375\u00b0 for 15 to 20 minutes."]
["butter", "sugar", "brown sugar", "egg", "salt", "peanut butter", "flour", "baking soda", "baking powder"]