I <3 food photography. I've been putting some feelers out there to some local businesses to try to get some things going.
I think the shallow DoF has it's place, and agree that it can be used here. But I also think you've only got it partially right. I don't think there's enough separation here to really highlight that front cupcake from the rest with a shallow DoF.
The lighting is a bit flat as well. I like what you've done with the cutting board/wood block, but some wrap-around lighting is definitely needed here to add dimension. Some water spritz would help shine up those blueberries, which makes them look juicy and more appetizing.