1st Layer:

20 cookies, crushed
3 tbsp. melted butter

2nd Layer:

1/2 c. softened butter
1 1/2 c. powdered sugar
3 egg yolks
2 sq. melted chocolate
3/4 c. chopped walnuts

Fold in 3 beaten egg whites.

3rd Layer:

1 1/2 c. whipped topping
1 c. mini marshmallows

4th Layer:

12 crushed cookies