Growing Pudding

IT WILL NOT ROTATE! So you're just going to have to turn your head to the side!

So my mum has a pudding mix that seems to be growing (and getting smellier) in the kitchen. It requires stirring. And it has a name, like an actual name! I hope that it turns into a cake soon!
It also reminds me of the children's story about the cake which just never ends...mmmm!