Jell-O Chocolate Pudding Fudge

Microwave 4 of the chocolate squares, 6 tbsp of butter and water in large microwavable bowl on HIGH for 2 minutes or until butter is melted; stir. Add dry pudding mix; stir until well blended. Add powdered sugar, 1 cup at a time, stirring until well blended after each addition. Press into foil-lined 8-inch square pan. Microwave remaining 4 chocolate squares and 2 tbsp butter in large microwavable bowl on HIGH 1½ minutes or until butter is melted. Stir until chocolate is completely melted. Spread over pudding mixture. Refrigerate 2 hours or until firm. Cut into 48 (1-inch) squares.