Heat oven to 375 degrees F.
Combine flour, sugars, baking soda, salt, shortening, peanut butter, milk, vanilla and egg. Beat at low speed until dough is stiff.
Shape dough into 1-inch balls; roll in sugar. Place 2 inches apart on ungreased baking sheet.
Bake in 375 degree F oven for 10 to 12 minutes or until golden brown. Immediately top each cookie with a candy kiss, pressing down firmly so cookie cracks around edges. Remove from baking sheet to rack to cool. Makes 5 dozen.