Frozen-yogurt shops are all the rage, with one chain—Red Mango—opening 150+ locations since 2007. Why is this cold stuff so hot? Subbing nonfat frozen yogurt for soft-serve ice cream can be a smart option calorie-wise, saving you 100 calories in a “small” 5-ounce portion. It’s easy to undo those calorie savings, though, depending on your choice of toppings.
—Hillary Gilson