Cream together:

1/2 cup peanut butter
1/2 cup shortening
1/2 cup white sugar
1/2 cup brown sugar.

Add:

1 egg
2 Tablespoons milk
1 teaspoon vanilla extract (not flavoring, use extract!).

Mix together then add to creamed mixture:

1 3/4 cup flour  (I use 3/4 cup whole wheat flour, and 1 cup white flour)
1 teaspoon baking soda
1/2 teaspoon salt

Form into balls about 1 inch in diameter, roll in granulated (white) sugar.  Bake in 350 oven for about 8-10 minutes or until set.  Take out of oven and immediately press a chocolate kiss into center.  Remove to wire rack  to cool.  Kisses will get soft as they take on the heat of the cookies, but will firm up again as the cookies cool.