Maybe something like Classy Confections? I like alliterations in business names, I think they're cute :3 But really, Slice of Cake would be a great name, nice and simple, and you already identify with it. Congratulations on your DD as well! You're wonderfully talented.
How about 'piece of cake'--you know that saying, like "don't worry, it's a piece of cake'. Or a play on words, you could do 'peace of cake'. Or simply "Pieces" it goes with the phrase, and at the same time, your cakes are pieces of people's lives-birthdays, weddings, etc. Though I really do like your logo that you've got going there with the word slice. It's sweet
anyway.. your dA name would be a great name for a shop.. basic but.. effective?