Both cakes are made with a similar batter; however, a Chocolate Lava Cake is typically made in a ramekin and baked in the oven for a short period of time. This sets the exterior of the cake, while the interior remains molten. This Chocolate Mug Cake is cooked in a mug in the microwave. Due to the insulating properties of ceramic, and the way a microwave cooks, the interior of the cake cooks before the exterior, which results in a fully cooked cake covered in a molten chocolate sauce on the exterior.