I was baking cakes for a gourmet shop and put two chocolate cakes in oven to bake and when I opened the oven an hour later, they were raw - the oven wasn't working. I didn't know what to do. I couldn't borrow an oven and I didn't want to waste the batter, so I came up with the idea of steaming them and they came out great! Thick and fudgy, like pudding cake. That happy accident was always in the back of mind.