Milky Way Pie

This is my mom's recipe. She has made it since I was little.
Milky Way Pie

1/2 cup butter
3/4 cup sugar
2 squares cooled melted Baker's unsweetened chocolate
2 eggs
2 cups thawed cool whip
1 pie crust

Cream 1/2 cup butter with 3/4 cup sugar. Stir in 2 squares cooled melted Baker's unsweetened chocolate. Add 2 eggs, one at a time, beating each egg 5 minutes at high speed. Fold in 2 cups thawed cool whip. Pour into a cooled 9 inch pie shell. Chill until firm - about 2 hours (can be frozen). Disclaimer: these are raw eggs so be careful what eggs you use.