Whole eggs can be whipped with other ingredients over a water bath or very low heat. (If using an electric whisk, a water bath may not be needed.) Adding sugar stabilizes the mixture, forming the foundation of many cakes; citrus fruit juices and liqueurs are sometimes included for flavor, particularly in mousses. Egg yolks can also be whipped with other ingredients, for example with water as in hollandaise and with sugar as in cakes.
In sweet recipes, whipping whole eggs with a little sugar helps the egg mixture to thicken and become creamy.