Ice Cream Fudge Dessert
["20 Oreo cookies, crushed", "1/4 c. melted butter", "2 qt. vanilla ice cream", "1 can hot fudge ice cream topping", "1/2 pt. Cool Whip", "walnuts"]
["Mix crushed Oreos with melted butter.", "Spread in 9 x 13-inch pan.", "Freeze."]
["cookies", "butter", "vanilla ice cream", "walnuts"]