Make sure your sounds are on because when you click on each ingredient, you can hear it get selected. After you pick all your ingredients, did you click Create? It is on the top center. 
The baking is pretty unintuitive though (I just came here with the same issue). I think there should be some marker on every ingredient selected, so it becomes visually clear what I picked.
Otherwise, if I select something wrong, there is no way to clearly de-select that ingredient?
I think that part could've been done a little better.
Other than that it was pretty sweet. :)