“My cake is caving in the middle, what happened?”
There are a couple possible reasons for this: what most likely happened is that your oven wasn’t set to the right temperature. The wrong temperature can cause your cake to rise too much resulting in it collapsing on itself. Make sure you pay close attention to the temperature settings and keep in mind that every oven is different. Another reason why your cake may be caving in is that it's underbaked. To check if your cake is underbaked, insert a toothpick or a wooden skewer into the center of your cake - if it comes out clean, it’s cooked through, but if it has crumbs, it’s not done baking!