1 cup hot fudge
1 (8 oz.) tub whipped topping
Sprinkles (optional)
Unwrap ice cream sandwiches and arrange 6 on bottom of a large jelly roll plate. Spread about 3/4 of hot fudge on top, then arrange remaining ice cream sandwiches in a second layer atop the hot fudge. Cover the entire cake with whipped topping. Place in freezer until firm, about 3 hours. Just before serving, melt the remaining hot fudge and drizzle over the cake. Decorate with sprinkles, if desired.