A delicious cake you make in a mug, in a microwave, in less than 10 minutes? Yes, it may sound crazy but it actually works and this latest baking craze is quickly catching on, spreading across blogs  and Instagram and Pinterest with photographic proof of baking brilliance. Fancy giving it a try? Here is the definitive mug-cake cookbook that will guarantee you success every time with 40 fantastic, foolproof recipes.