This charmingly old-fashioned Surprise Cake is a delightful example of resourceful home baking, made unique by its unexpected ingredient, tomato soup! Popular during the Depression era, this cake’s origins lie in maximizing pantry staples, resulting in a moist, spiced cake that surprises everyone with its rich flavor and tender texture. Often compared to spice cake, the tomato soup adds depth without being detectable. This beloved recipe is simple, nostalgic, and perfect with a dusting of powdered sugar or a dollop of whipped cream.