As a result of the members of the Collective that are competent in the kitchen discovering that extra food would be welcome, they decided to try something they've never made before.
That being Black Forest cake. There was a minor amount of smacking the hands of the Edwards with some scolding when one took some of the kirschwasser to try and then promptly complained about the taste. The cakes did manage to get completed eventually after both Edwards were threatened with dire consequences if they didn't get out of the kitchen and stay out.
This is why Al is setting one of the two cakes made for other people to eat on the dessert table.