You walk up to place your order at Moody's Donuts and—genius!—you see what's been whining away. On the back counter, one leg balanced on paperback book, a small automatic donut fryer is churning out sweet, hot rounds of deliciousness. Its funnel-like reservoir drops batter (a rice- and wheat-flour blend) into a narrow channel of oil, and, like clockwork, little flippers rise from the oil, turning the cake donuts and sending them on their way. More