Preheat oven to 375 degrees and unwrap Hershey kisses.
Cream shortening and peanut butter together in a large bowl. Add sugars and mix to combine.
Add egg, milk and vanilla, beat well.
In a separate bowl, combine flour, baking soda and salt. Gradually add flour mixture to creamed mixture; blend thoroughly.
Shape dough into 1-inch balls. Roll in granulated sugar. Place on ungreased cookie sheet.
Bake at 375 degrees for 10-12 minutes. Immediately place an unwrapped kiss on top of each cookie, pressing down so that the cookie cracks around the edges. Let cool on baking sheet 2-3 minutes. Continue cooling on rack.
Notes
To make these extra festive for the holidays, you could use red and/or green granulated sugar to roll the dough balls in before baking.