1. Heat oven to 375 degrees F.
2. Combine flour, sugars, baking soda, salt, shortening, peanut butter, milk, vanilla and egg. Beat at low speed until dough is stiff.
3. Shape dough into 1-inch balls; roll in sugar. Place 2 inches apart on ungreased baking sheet.
4. 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.