1 Before adding the eggs, if they were in the refrigerator, make sure to bring them to room temperature. It might seem like a small step, but the room-temperature eggs are much easier to whip with sugar. With the quickly prepared smooth batter, your lava cake will be lighter, fluffier, and have a more delicate crust.
2 The best way to get a gooey chocolatey centre is to use a dark chocolate bar. Avoid adding chocolate chips as they hold their shape and will not give you a flowy centre. So, a chocolate bar, semi-sweet or dark chocolate with about 50-70% cacao that can be easily melted, would be the perfect option.
3 The secret behind achieving a flowy lava-like centre also lies in the timing. Initially, set the oven timer to ten minutes. If the edges are firm, take the ramekins out as the centre needs to be soft and jiggly.
4 The best time to serve chocolate lava cakes is fresh out of the oven. If they come down to room temperature, the molten chocolate will firm up. If you still need to store the cakes for some time, microwave them for about ten seconds before serving.
5 While this is the standard recipe to make chocolate lava cake, you can always experiment with different additives. Depending on what your partner likes, you can add ingredients such as instant coffee, sea salt, and caramel sauce, among others.