Crumble 2-3 pks of Marie biscs.Melt 1  LGE butter in saucepan,low,add cocoa & vanilla.Stir till all dissolved ad 1 full egg..Take off heat & ad biscs.Cover all & push into a 1-2" bake tray- to fridge it.After 1-2 hrs it will be hard.Cocoa into Icing sugar & ice all top.Sprinkle crushed nuts & or coconut & slice.Must be always fridged.