Easy variations for ice cream cake - cookie crust can be made using shortbread cookies, vanilla cookies, etc. The cake can easily be frosted with a ganache to just cover the top of the cake - just make sure that your cake is well frozen prior to topping with a warm ganache. Fruit jams could be used as a filling in place of hot fudge. Other things that hold up as well as pound cake - brownies, chocolate chip cookies, ice cream sandwiches.