Chef Roy's Karo Plus Recipe Chef Roy is desperate, it is 7am and his hungry cats need some food. What to do? Chef Roy has a plan- the Karo plus recipe. Ingredients: 1 can of cat food(large or small) Karo Syrup(a few spoonfuls) Cats' favorite dry food--About half the volume of the can. Water to moisten. Directions: Dump the dry food into a large bowl and add a few spoonfuls of Karo Syrup and water to moisten the mixture Add the canned food and mix well--it makes a kind of dryish slurry that cats love.