1. COMBINE FIRST FOUR INGREDIENTS. ADD EVAPORATED MILK AND MIX WELL. ROLL INTO 1 BALLS AND PLACE ON WAX PAPER LINED COOKIE SHEET.FLATTEN TO 1/4 INCH.COVER AND FREEZE FOR 30 MIN. MELT CHOCOLATE AND SHORTENING;STIR UNTIL SMOOTH. DIP PATTIES ALLOWING EXCESS TO DRIP OFF. PLACE ON WAX PAPER LET STAND UNTIL SET.