A soft, unripened cheese with the texture and flavor of sour cream, Quark comes in two versions lowfat and nonfat. Though the calories are the same (35 per ounce), the texture of lowfat Quark is richer than that of lowfat sour cream. It has a milder flavor and richer texture than lowfat yogurt. Quark can be used as a sour cream substitute to top baked potatoes, and as an ingredient in a variety of dishes including cheesecakes, dips, salads and sauces. See also cheese.