Buttercream is a fun theme that would be perfect for a blog about cupcakes, which seem to be all the rage at the moment. Seriously, check out Google trends.
The theme author, Caroline Moore, has a pretty cool personal site, where you can find more of her creations.
The design is fully responsive (do I really need to say that? Probably not, but I’m going to anyway) and looks good at smaller screen sizes. Not all responsive themes do, you know: some make a right old mess of it. But not Buttercream, nor any theme featured on this site for that matter.
Buttercream isn’t the most versatile theme in the world. I mean, I can’t think of too many uses for it outside of food blogs, though that could just be me failing to exercise the imagination. But if you do have a site you think it would suit or that you could adapt it to (you’d want to replace that header, for a start!), I dare say you will be pleased with the result.