Here's a great back pocket recipe for chocolate cake that you can always pull out whenever you need something that's easy to prepare and sure to please. The cake has a light and airy crumb thanks to the beaten egg whites and yeast in the batter, which ensures it rises in the oven. The ganache, on the other hand, is delightfully rich and silky smooth, and making it is a breeze: Just heat the cream, pour over chopped chocolate, and stir to melt; it will thicken as it cools.