www.howdini.com Halloween cake decorating: How to make a kitty litter cake recipe It’s a trick…it’s a treat…it’s a Kitty Litter Cake! It’s perfect for a gross out Halloween party. Kids and adults will be delighted and repelled! Here’s how to make your own kitty litter cake, courtesy of comedian Lizz Winstead and kitsch king Bruce Littlefield, author of Garage Sale America. 1. Invert 13 x 9 chocolate cake into a new (unused) litter box. The cake and litter box create the base for the …