Mom Always Finds Out received a copy of Mug Cakes recipe book for review. All opinions expressed are my own. The Caramel Apple Mug Cakes recipe is shared here with permission. The sponsor is responsible for prize fulfillment. You could be eating cake in 5 minutes. Really, you could! Five minutes or less is all it takes to make a delicious mug cake in the microwave. You don't need store-bought cake mix - all it takes are a few simple ...