Satisfy your fall flavor cravings with this pumpkin spice mug cake recipe. It's an easy way to enjoy your very own cake, ready to eat in 60 seconds! The first microwave mug cake I ever made came from the Mug Cakes: 100+ Speedy Microwave Treats To Satisfy Your Sweet Tooth book by Leslie Bilderback. I was amazed to see it was possible to make a single serving cake in the microwave. (See Leslie's Caramel Apple Mug Cake recipe.) I got on a mug ...