NYT Cooking: Born out of a scarcity of fresh eggs, chocolate-mayonnaise cake is one of those Depression-era recipes that sounds a lot stranger than it tastes. After all, cakes rely on eggs and fat for tenderness and richness, and mayo is made of exactly those things, plus some salt and vinegar to give it tang. But you don’t taste the tanginess of the mayo, and if you didn’t tell anyone it was there, they wo...
