Something you wouldn't believe could exist unless you have a rudimentary understanding of thermodynamics. Basically you take a scoop of ice cream, coat it in a tasty, crispy batter, and quickly fry it in hot fat until the outside is crisp but the inside hasn't yet had a chance to melt. You then serve it as a sundae, say with hot fudge and whipped cream.

Tasty, but not low calorie.