Yes, you do use egg whites
You would use 4 medium egg whites or 5 small egg whites.
if you want to
The only substitution for egg whites in a frosting made with egg whites would be powdered egg whites sold in baking supply shops. Powdered egg whites have the advantage of being safe from salmonella sometimes found in raw eggs.
Make merangues.
Use natural glues like egg whites if you use any at all. It is better to avoid glues if at all possible.
If a recipe calls for "2 eggs," it means THE WHOLE EGG. If they want you to use the egg yolk only, it will say, "add the yolk of 2 eggs." If they want you to use the egg whites only, it will say, "separate the eggs and beat in the whites." To 'separate' an egg means to separate the yolk from the whites.
Any bowl or utensil that is used when beating egg whites has to be perfectly clean and grease-free. When air is beaten into egg whites, the proteins of the egg white open up, which makes the whites form a semi-solid. If there are any lipids introduced into the egg whites they prevent the whites from forming a semi-solid state by surrounding the proteins of the egg whites and preventing the proteins from opening.
Using a plastic bowl for egg whites is not advisable because the proteins in egg whites can bond with the plastic, leading to potential contamination and lingering odors. Additionally, plastic bowls may not whip egg whites effectively, as they can retain grease or residues that inhibit the formation of stable peaks. For best results, it's recommended to use glass or metal bowls when preparing egg whites.
To make a healthier version of French toast, use egg whites instead of whole eggs. Egg whites are lower in calories and fat, making the dish healthier. Simply separate the egg whites from the yolks and dip the bread in the egg whites before cooking as you normally would for French toast.
The egg whites don't move and you can make them into peaks. They are very stiff. Make sure you use a metal or glass bowl when beating egg whites they will beat better rather than in plastic.
White? Do you mean egg whites for a meringue icing? If so, you can't substitute for egg whites unless you have purchased powdered egg whites. Do you mean white as a color and flavor? Any color/flavor will do, depending on your taste.