1 box Nabisco chocolate wafers, crushed
1 stick butter, melted
8 eggs
1 (12 oz.) pkg. chocolate chips, melted
1 (12 oz.) creamy Cool Whip
Cool Whip for topping

Reserve 1/4 cup wafer crumbs (for topping). Add remaining crumbs to melted butter. Line bottom and sides of springform pan with crumb mixture. Beat 2 whole eggs into melted chocolate. Beat in 6 egg yolks. In another bowl, beat 6 egg whites until fluffy. Alternately fold in egg whites, Cool Whip and chocolate mixture. Pour into pan. Refrigerate at least 1 hour. Add Cool Whip for topping and sprinkle with reserved crumbs.