Egg replacements, or substitutes, are ingredients used in cooking and baking to mimic the properties of eggs. They are often used by those with dietary restrictions, such as vegans or individuals with egg allergies. Common substitutes include applesauce, mashed bananas, and flaxseed meal, which can provide moisture and binding in recipes. In addition to fruit purees and seeds, commercial egg replacers are available, typically made from starches and leavening agents. Each substitute works best in specific recipes, so it's important to choose the right one based on the desired outcome, whether for cakes, cookies, or omelets.