Liquid egg yolks are the yellow part of an egg that contains essential nutrients, including vitamins A, D, E, and K, as well as healthy fats and proteins. They are often used in cooking and baking for their rich flavor and ability to emulsify mixtures, making them a key ingredient in sauces like hollandaise and dressings. These yolks can be found in various forms, including fresh, pasteurized, or frozen. Liquid egg yolks are convenient for recipes that require yolks without the hassle of separating them from the whites, making them popular in both home kitchens and commercial food production.