Put 1/2 gallon ice cream, 2 cups milk, and 1 large or 2 small packages of vanilla pudding in blender. Split in 2 equal portions - put one portion on top of crust. Cover with one large carton of Cool Whip and then second portion of ice cream, milk, and pudding. Sprinkle with crushed toffee bars (Heath) and place in freezer before serving.