While they may sound similar at first glance, there are a few key differences. * Lemon Sauce is thin and pourable - almost like a syrup. It's great poured over pancakes, waffles, ice cream, bread pudding, pound cake, gingerbread, and many other desserts. * Lemon Curd is thicker and typically has to be spread. Curds also contain eggs. Typically, this is used as a filling in desserts like bars, cakes, and pies.