This is a single-layer flourless chocolate cake that’s fudgy, silky, and practically melts in your mouth. The cake comes together quickly in one bowl, and the ganache can be made in minutes, though it’ll look and taste like you spent hours making the cake. It’s easy enough to whip up the moment a chocolate craving strikes. Plus, it’s even scrumptious when still warm from the oven sans ganache if you just can’t wait a minute longer.