When you serve one of these frozen goodies this summer, your friends will think you're a great cook. And if you tell them it only took a few minutes to throw together: a genius too! No need to divulge that low-fat vanilla frozen yogurt is your go-to ingredient…unless you want to let them in on the secret that these sweets are better for you too. Low-fat fro-yo has about half the calories and a fraction of the fat of some regular ice creams. Calories vary among brands, so look for one with about 100 calories per 1/2-cup serving and get ready to be a hero.