Cream peanut butter with butter/shortening and sugars until fluffy. Beat in egg, milk, vanilla. Stir in flour, baking soda, salt to form dough. Roll dough into balls and coat in granulated sugar. Bake on ungreased sheet at 375?F for ~8?10 min until puffy. Immediately press an unwrapped chocolate Kiss into the center of each cookie (the cookie will crack around edges).
Cool until chocolate sets..