I think this chocolate peanut butter swirl with a banana on top is the epitome of what a cupcake should be: beautiful, stunning to look at, and makes you want to eat it! It's by
Dixie Belle Cupcake Cafe in Fredericksburg, Texas, via
Flickr. Find out more about them on their
Facebook page.

And a few more of their cupcake creations, descriptions via Flickr:

Guinness & Baileys Cupcakes: "a tender, moist Guinness chocolate cupcake filled with a rich dark chocolate Baileys Ganache, topped with a Baileys Butter Cream and drizzled with Baileys Ganache"

M&Ms cupcakes

Pina colada cupcakes: "rich, moist rum cupcake baked with fresh pineapple and coconut, brushed with a rum glaze, topped with a Pineapple, Coconut, Rum Butter Cream, toasted Coconut and a Cherry"

blueberry lemon cupcakes (seems to be the cupcake flavor of summer 2011!): "tender, moist lemon cupcake filled with a Blueberry Lemon Tahitian Vanilla Cream, topped with Lemon Butter Cream, fresh Lemon Zest and a fresh, plump Blueberry"

sunflower cupcakes