Charles Stuart Platkin, pictured above, aka the "The Diet Detective," weighs in on our beloved cupcakes:
I recently had a few bakery-purchased cupcakes analyzed for a segment I did on National Public Radio and found that a 6.5-ounce vanilla cupcake (from the famed New York Crumbs bakery) has 780 calories, 107 grams of carbs and nearly 36 grams of fat. Magnolia (another famous New York bakery) sells a 3-ounce cupcake with 389 calories, 52 grams of carbs and almost 19 grams of fat. So, cupcakes are not exactly the best snack choices. But that doesn’t necessarily make muffins a slam dunk. In fact, muffins can be calorie catastrophes, and, unlike cupcakes, we don’t usually think of them as dessert...
Fit Tip: If you’re among those who like the cake part of the cupcake and can forgo the frosting, you can save up to 140 calories.
He also has a podcast up about snacks; haven't listened, but there's a picture of a cupcake illustrating it on his site. He's also the author of the forthcoming Diet Detective's Calorie Bargain Bible.