My #1 tip for lava cakes is to NOT overbake! You might be nervous to take them out so soon, because they will definitely not look set in the center. This is good! You want them to look wet and jiggly in the middle, and just set around the edges. They will continue to set as they cool. Trust me, an overbaked lava cake is a sad, dry lava cake. Removing them when they still look wet in the middle is the key to lava cake success.