each egg yolk
Egg yolks are rich in choline, selenium, and lutein (beneficial for eye health), and contain all nine essential amino acids. They are a significant source of dietary cholesterol and fat-soluble vitamins (A, D, E, and K), making them highly nutrient-dense.
About
An egg yolk is the nutrient-dense, lipid-rich central portion of a chicken egg (or other bird eggs), surrounded by the albumen (egg white) and enclosed within the shell. It consists primarily of fats, proteins, and water, along with the yellow pigment lutein and zeaxanthin derived from the hen's diet. Egg yolks vary in color from pale yellow to deep orange depending on the hen's feed, with darker yolks typically indicating higher carotenoid content. The yolk serves as the embryo's nutritional source during incubation and remains viable for several weeks when properly stored.
The yolk contains the lecithin and cholesterol necessary for cellular function, making it one of the most nutritionally complete foods available. Commercial and heritage egg varieties produce yolks of differing sizes, richness, and flavor intensity based on breed, diet, and rearing conditions.
Culinary Uses
Egg yolks function as an essential binding, emulsifying, and enriching agent across virtually all culinary traditions. They are fundamental to classic sauces (hollandaise, béarnaise, mayonnaise), custards, ice cream bases, and baked goods, where they contribute moisture, structure, and golden color. In Italian cuisine, yolks are central to carbonara and fresh pasta doughs; in French cooking, they're essential to pâtes à choux and crème anglaise. Yolks also serve as an ingredient in salad dressings, aiolis, and vinaigrettes, and are used raw or lightly cooked in preparations such as zabaglione, syllabub, and eggnog. Their richness makes them valuable for coating and enriching soups, braises, and cream-based dishes.