In yogurt we trust. But a lot of the yogurt that Americans eat isn’t all that healthy. Among the low-fat and plain varieties of the dairy aisle, many products are basically desserts. Danone sells YoCrunch cups, flavored yogurt with toppings such as M&Ms and Snickers pieces. One of the best-selling yogurt options on Target’s website is a Chobani cup that comes with pieces of cookie-dough. There are also versions with other mix-ins: s’more, mint-chocolate-chip, cookies-and-cream. If they all sound unabashedly sundae-like, they should. The line between yogurt and ice cream is a lot blurrier than you might think.