Although fruitcakes and rich, yeasted cakes were the traditional English festive cakes, the modern form of the birthday cake originated in American kitchens in the mid-nineteenth century. In contrast to their European counterparts, American women were active home bakers, largely because of the abundance of oven fuel in the New World and the sparsity of professional bakers. By the later 1800s, home bakers were spurred further by several innovations. The cast-iron kitchen stove, complete with its own quickly heated oven, became standard equipment in urban middle-class homes. Women in towns had more discretionary time, compared to farmwomen, and they had an expanding social life that required formal and informal hospitality. Sugar, butter, spice, and flour costs were dropping. Improved chemical leavening agents, baking powder among them, enabled simpler and faster baking and produced a cake of entirely different flavor and texture. A cake constructed in layers, filled and frosted, became the image of the standard birthday cake. One observer of the early 1900s compared bubbly soap lather to “the fluffiness of a birthday cake” and snowy, frost covered hills to iced birthday cakes.