1.  In a large mixer bowl, beat margarine and peanut butter with electric mixer on medium speed about 30 seconds. Add the sugars and beat until fluffy. Add egg, milk, and vanilla. Beat well.

2.  In a mixing bowl, stir together flour, baking powder, salt, and baking soda. With mixer on low speed, gradually add flour mixture to peanut butter mixture, beating well. If necessary, cover and chill about one hour for easier handling.

3.  Preheat oven to 375° F. Shape dough into one-inch balls. Roll in additional granulated sugar. Place about two inches apart on ungreased cookie sheets. Bake about 10 to 12 minutes, or until edges are firm. Immediately press a chocolate "kiss" atop each cookie. With a spatula, lift cookies onto cooling rack. When cool, store in an airtight container.

Makes approximately 60 cookies.