Sawdust Cake
["1 (1 lb.) pkg. vanilla wafers", "1 stick margarine, melted", "1/2 gal. butter pecan ice cream", "12 oz. Cool Whip", "caramel or butterscotch topping"]
["Crush vanilla wafers; mix with melted margarine.", "Hold out one cup of crumbs.", "Press the rest of the crumbs in a 9 x 13-inch pan. Mix partially melted ice cream with the Cool Whip and pour over crust; drizzle topping over top and cover with remaining crumbs. Freeze overnight."]
["vanilla wafers", "margarine", "butter", "caramel"]