FIRST LAYER:

30 crushed Oreos
3 tbsp. butter

Pat in 13 x 9 x 2 pan.

SECOND LAYER:

1/2 c. butter
1 1/2 c. powdered sugar
3 egg yolks
3 sq. melted unsweetened chocolate

Mix these and spread on top of the first layer.

THIRD LAYER:

2 1/2 c. Cool Whip
1 1/2 c. mini marshmallows
3 tbsp. powdered sugar
1 1/2 tsp. vanilla

FOURTH LAYER:

Sprinkle with 10 crushed Oreos. Freeze or refrigerate and eat.