We tried Masterpiece after it first opened and sampled the Picasso, the Warhol, and the Klimt. I'm not a donut connoisseur by any stretch, but all of them could have benefited from a lot less topping. They were way over-the-top sweet, so much so the flavor of the donut was lost.
The menu describes the underlying donut as a cake donut, but I can't vouch for that. All I could really taste was sugar. I would recommend just ordering from the custom menu and that way you can limit the topping to something that isn't so overwhelming. I ate there a second time recently and ordered their "Healthy Bowl." I was disappointed. For $7.00, I would have expected something freshly made and what I got definitely wasn't.