eggs plus one egg yolk

DairyYear-round. Chicken eggs are produced continuously, though seasonal variation in feed composition affects yolk color and nutritional density. Peak production occurs in spring and early summer.

Egg yolks are rich in choline, lutein, and zeaxanthin (supporting eye health), and provide bioavailable protein, selenium, and B vitamins. They are also high in dietary cholesterol and lipids, approximately 55% of their weight being fat.

About

An egg yolk is the nutrient-rich yellow or golden-orange central portion of a chicken egg (or other bird eggs), composed primarily of lipids, proteins, and water, along with essential vitamins and minerals. The yolk is surrounded by the albumen (egg white) and encased in a porous shell. Yolks vary in color intensity depending on the hen's diet—carotenoid-rich feeds produce deeper golden-orange yolks, while pale yolks result from grain-based diets. The yolk comprises approximately one-third of a whole egg's mass and contains the embryo's primary nutritional support system.

Egg yolks are distinct from whole eggs in their composition and function in cooking: while whole eggs provide structure and binding, yolks contribute richness, emulsification, and deeper flavor. Individual yolks are commonly separated and used where their specific properties are required—principally for creating stable emulsions (mayonnaise, hollandaise, aioli), enriching custards and ice creams, and producing tender, golden baked goods.

Culinary Uses

Egg yolks serve multiple critical functions across global cuisines. As an emulsifier, they are essential to French mother sauces (hollandaise, béarnaise) and classical preparations like mayonnaise and aioli, where their lecithin content stabilizes oil-in-water suspensions. In pastry and baking, yolks enrich doughs, custards, and ice cream bases, contributing moisture and a deep golden color. They are fundamental to creamy desserts including crème brûlée, zabaglione, and sabayon, as well as to pasta doughs in Italian cuisine. In Asian cooking, yolks are cured for complex umami depth, or lightly cooked as in ramen toppings. Yolks also serve as a finishing enrichment in sauces, soups, and gratins.

Forms & Preparations

  • Fresh whole yolk — Raw or lightly cooked yolk separated from the white, used for emulsifications, enriching batters, or tempering into hot liquids.
  • Pasteurized liquid yolk — Heat-treated yolk product for food service, providing safety with a longer shelf life while maintaining emulsifying properties.
  • Cured egg yolk (Ajitsuke Tamago) — Japanese-style salted and soy-marinated yolk with concentrated umami, served as a topping or condiment.
  • Hard-cooked yolk — Fully set yolk, sliced or grated for garnishing salads, composed plates, or as a binding ingredient in preparations like deviled eggs.
  • Yolk powder — Spray-dried yolk used in food manufacturing for extended shelf stability and consistent emulsifying properties.
  • Salted yolk (Century egg or pidan yolk) — Preserved yolk with mineralized, translucent appearance and complex savory flavor, common in East Asian cuisine.

Substitutes

  • Unknown — Use one whole egg to approximate the binding and emulsifying properties of one yolk, though liquid content and richness will differ; adjust ratios depending on whether texture or emulsification is prioritized.
  • Unknown — For emulsification specifically: 1 teaspoon lecithin can replace one yolk's emulsifying capacity in sauces and vinaigrettes, but lacks the nutritional enrichment and visual properties.
  • Unknown — In baking or sauce applications, use as a 1:1 replacement by weight for yolks when richness and structure are the goal, though it adds additional oil and prevents further emulsification.
  • Unknown — For meringues and whipped applications: 3 tablespoons aquafaba approximates one egg white's whipping properties, though cannot replace yolk's emulsifying or enriching functions.
  • Unknown — In baking, a mixture of melted butter or oil with cornstarch can approximate yolk's binding and enriching properties (roughly 1 tablespoon fat + 1 teaspoon starch per yolk), though lacks the emulsifying capability.