Peanut Butter Piece Cookies
["2/3 c. butter or margarine", "1 c. sugar", "1 egg", "1 1/2 tsp. vanilla", "1 2/3 c. unsifted flour", "1/2 c. unsweetened cocoa", "1/2 tsp. baking powder", "1/4 tsp. salt", "1/3 c. milk", "1 c. coated peanut butter pieces (Reese's pieces)"]
["Cream butter, sugar, egg and vanilla until light and fluffy. Combine flour, cocoa, baking powder and salt; add alternately with milk to creamed mixture.", "Stir in 1/2 cup peanut butter pieces. Drop by teaspoon, 2 inches apart, onto lightly greased cookie sheet.", "Bake at 350\u00b0 for 7 to 9 minutes, or until set, but not dry.", "Cool slightly.", "Remove from cookie sheet onto wire rack."]
["butter", "sugar", "egg", "vanilla", "flour", "unsweetened cocoa", "baking powder", "salt", "milk", "butter"]