Substituting eggs is tricky because eggs play different functions in foods: emulsifying, enriching, adding structure when baking. Consider the recipe and whether the yolk or the whites are more important. If baking a cake, it's probably the white (for structure), and you may need to add additional baking powder or a different leavening. For brownies and cookies it's probably the yolk that is important for richness or emulsion, and possible substitutes might range from additional oil or butter to yogurt, applesauce or bananas. The link attached below provides further information.
as a binding agent
A binding agent is an ingredient that holds all of the other ingredients together (i.e. flour)
Heavy cream can be used as a substitute for eggs. You can also use some sort of oil as a substitute, but this will depend on what you are making or cooking.
Meatballs may fall apart when cooked if the mixture is too dry or lacks a binding agent like eggs or breadcrumbs. Adding more moisture or a binding agent can help them hold together better during cooking.
The egg in baking is used as a binding agent.
A good egg substitute for breaded chicken is a mixture of 1 tablespoon of ground flaxseed or chia seeds mixed with 3 tablespoons of water. This mixture can be used as a binding agent in place of eggs when breading chicken.
You can't put milk as a substitute for eggs in a recipe. Eggs are a binder and a leavener. Milk has niether of these qualities. There is an egg substitute you can buy( powdered). Also in small amount recipes you can use ground flax seed mixed with water as an binding agent but it doesn't have leavening properties.
You can use ingredients like breadcrumbs, oats, flaxseed meal, or mashed potatoes as a binding agent in meatloaf instead of eggs.
To prevent meatballs from falling apart while cooking, make sure to thoroughly mix the ingredients together, use a binding agent like breadcrumbs or eggs, and refrigerate the meatball mixture before cooking to help them hold their shape.
To make delicious potato pancakes without using eggs, you can substitute mashed bananas, applesauce, or flaxseed mixed with water as a binding agent. These alternatives will help hold the ingredients together and create a tasty pancake without the need for eggs.
Blood can be used as an alternative to eggs in cooking and baking due to its binding properties. It can be used in recipes such as blood pancakes, blood pudding, and blood custard. However, it is important to note that using blood in cooking requires careful handling and cooking to ensure safety and proper flavor.
In baking, eggs add criticla moisture, act as the main binding agent, and can add a "shine" to the top of baked goods.