In a large bowl, combine the cookie crumbs, butter and sugar. Press into an ungreased 13-in. x 9-in. dish. Refrigerate for 15 minutes. Carefully spread hot fudge topping over the crust. Spread ice cream evenly over topping. Spread raspberry sherbet over ice cream; swirl gently. Top with whipped topping. Cover and freeze for 8 hours or overnight.
Remove from the freezer 10-15 minutes before serving. Garnish with mint and raspberries if desired. Cut into squares. Yield: 12-15 servings.