Preheat oven to 375 degrees F.
Beat shortening and peanut butter in large bowl until thoroughly combined.
Add 1/3 cup granulated sugar and brown sugar; beat until fluffy.
Add egg, milk and vanilla; beat well.
In a separate bowl, stir the flour, baking soda and salt together.
With the mixer running, slowly add the dry ingredients into peanut butter mixture.
Form dough into 1-inch balls and roll in remaining granulated sugar.
Place cookie balls on ungreased cookie sheet.
Bake for 8 to 10 minutes or until lightly browned.
While cookies are baking, remove wrappers from Hershey Kisses.
When cookies have finished baking, immediately press a Hershey Kiss into the center of each cookie; cookie will crack around edges.
Remove from cookie sheet to wire rack and cool completely before storing.