If you are a calorie-conscious person, you can even make this curd sugar-free by substituting sugar with a liquid artificial sweetener that lowers the calorie count, and therefore contributes to the nutritional value of the lemon curd. Other fruit flavors such as tangerines, limes, and mangoes, and berry flavors such as blackberries and cranberries are also enjoyed on a wide scale. However, lemon still remains one of the most popular flavors.