the original recipe calls for:
1 large (7 oz) plain Hershey bar
large tub Cool Whip
ready-made graham cracker pie crust...
however, I use 1 + 1/2 large (7 oz) Symphony bar instead (melts better & is smoother)
large tub Cool Whip
ready-made Oreo-style pie crust
melt the chocolate in a double-boiler;
immediately mix quickly into Cool Whip (don't mix it in the same pan because it won't get solid);
and pour into the pie crust.
add some shaved chocolate bar on top.
chill for a few hours.
very easy to make, & I've never known anyone who didn't love it. it's a standard at our holiday dinners