One of the Nantucket Grill's mile-high cakes. Replace the strawberries with frosting, and you've got a pretty good idea of the Unbirthday.

The latest trend among chichi cupcake bakeries is frosting shots: miniature cups filled with frosting that buttercream addicts like myself can order, sans cupcake, whenever they want a quick sugar rush. Don’t live in L.A. or Manhattan? You’re out of luck, unless you want to make your own shooters at home . . . or unless you live within driving distance of the Nantucket Grill in Durham, N.C. That restaurant, already known for being the only place below the Mason-Dixon line that offers whole-belly fried clams, has created a frosting lover’s dream come true: a 10-layer-high ode to diabetes known as the Unbirthday Cake.

One of the restaurant’s signature “mile-high” cakes, the Unbirthday consists of five layers of vanilla cake interspersed with five layers of rainbow-colored, sugary, delectable buttercream frosting. And the whole thing is frosted with, well, even more frosting. That’s a frosting-to-cake ratio I can really get behind. While my pancreas threatens to revolt if I ever have another slice, my taste buds are telling me I need to get back to Nantucket for another oversized slab of nirvana.