Pretty, with a cherry on top.
I'd probably be worried about eating a blue cake. Either there's ground-up Smurf in it, or it's got some mold. Either way, this thing looks swell. There's a certain cartoonish atmosphere that it creates, and it works well for the piece. It's not hard to imagine it as a power-up in some pixel game.
The shading is excellent on this one. The cake definitely has some dimension, and even the icing looks like it protrudes from its pastry-master a little. Really not a whole lot to improve on in this piece; it's pleasing to the eye and it's simple enough to take in all at once. However, it is lacking that mystical something that makes the jaw drop or makes the mind run. I don't know if you can even accomplish that with a subject like a cake, but I'd like to see you try.