Like a standard chocolate cake, the wacky cake contains the typical flour, sugar, oil, and cocoa powder, but it does not contain any eggs, butter, or milk.
Instead, this cake uses a combination of vinegar and baking soda to become fluffy. While most recipes call for white vinegar, you can also use apple cider vinegar.
Classic cakes usually use butter and milk, but a chocolate wacky cake relies on oil for fat and water as its liquid to create its unique batter. It's actually a vegan cake, too.
Although no one seems to know the exact date this cake was first invented, it's generally thought to have been created around the Great Depression when ingredients were scarce.
Today, thanks to its unique history, wacky cake is sometimes called Depression cake. It also goes by other names, such as cockeyed cake, crazy cake, or wartime cake.