cake bake

We went to a friend's house for dinner and she had something, which was quite... I don't know how to describe it. It's a cake which comes in a box. You just rip off the top, pour in some milk, stir it with a fork. You bake it in the box it comes. It actually tastes very good, but I don't think I want to have a look on the box to see the ingredients.

Her daughter had a look at it, and thought it was brown bread