Kitchen F#!% Ups

I've made this cake twice with few issues. So why did it turn out so weird tonight? It cooked for an hour, after which it looked set in the middle. I took it out to cool in the pan, on a rack, for fifteen minutes before I turned it out onto the rack. As soon as I turned it out, I could tell it wasn't cooked all the way through. It was cooked more than a molten chocolate cake, but definitely not enough to hold up to frosting. I stuck a spoon into the side and it practically melted. In the end, I served it without frosting or glaze, in bowls. It was still delicious. Just ugly.

• Chocolate-Amaretto Heart