Good idea to make for my boyfriend who loves these icecream between cookie treats. I personally hate them, why would a person want to eat two cookies + icecream at once? I feel the same way about calzones or when people fold their pizza in half.
ZEBRA cake instructions: just color half of white cake batter. Drop 2-3 tbsp of first color into center of cake pan, then do the same with the other color, making concentric circles. Keep layering the colors on top of each other. The batter will spread out on its own but once in a while you might need to tap the pan on the counter to help it along. If you don't get it to spread evenly, it won't bake evenly.