The problem with most candy bars and cookies is that they're too small to be full-fledged desserts -- but not if they become part of the dessert. Ice-cream and frozen-yogurt parlors got the idea a few years ago: Mix crumbled candy bars or crushed cookies into a light, flavorful base, and you've got a whole new creation.

All good ideas are worth tweaking, and this now-widespread favorite of the frozen also works wonderfully for countless other sweets. Heath bar in a crumb-cake batter, Butterfinger pie, and Oreo chunks in a cappuccino trifle. Lo, a pattern emerges. That it's low in fat is only part of the fun.