Dating back to the 1930s, Tomato Soup Cake was tremendously popular as it required very little butter and eggs, precious ingredients in Depression-era America. The flavors in this cake are rich with no true tomato taste, just the warmth of the spices and sweetness of the raisins. The cake keeps beautifully and can be enjoyed as a snack cake with no icing needed, or iced with a simple vanilla glaze to dress it up.