Serious Eats
How to Make Lettuce Cake Bars
There's cake made with carrot and cake made with zucchini, so why not lettuce? Nicole Weston of Baking Bites shares a recipe for spiced lettuce cake bars, specifically made with iceberg lettuce, and spiced with cardamom and ginger. Don't worry; your cakes won't taste like plant:
The cake bars are pretty good, and you wouldn’t know that they have lettuce in them unless someone directly told you or you didn’t get a great "shred" and a few big pieces slipped into the batter. They’re moist and soft, with a good balance of chewiness and tenderness.
Make them and see if anyone can tell what your special ingredient is.