Summer Surprise Cake 12-pack ice cream sandwiches 1 large container Cool Whip® Hershey's chocolate syrup 2 large Butterfinger candy bars 1/2 cup chopped pecans Spread a layer of ice cream sandwiches across the bottom of a cake tin. Spread Cool Whip on top. Crumble Butterfingers, and spread over Cool Whip. Drizzle chocolate on top and sprinkle with pecans. Put in freezer for a couple of hours to harden, then cut into squares and serve.