In mixing bowl, combine sugar, butter, milk and extract; mix well. Knead into large ball. Roll into 1 inch balls and flatten each into 2 inch circles. Wrap around cherries and lightly roll in hands. Place with stem up on waxed paper lined baking sheet. Cover loosely and refrigerate 4 hours or over night. Melt the chocolate chips and shortening in a double boiler or microwave safe bowl. Holding onto stem, dip cherries into chocolate; set on waxed paper to harden. Store in covered container. Refrigerate 1 to 2 weeks before serving. The longer they sit the juicer the center will be. Yield: about 3 dozen. *NOTE*: The cheap brand of cherries make a very dry cherry so you may not want to drain them that much. If you end up with a dry filling store them on the counter for a week, which seems to help some.