If a recipe calls for two eggs, but you only have one, you have a few options:
Adjust the recipe: Depending on the recipe and the role of the eggs, you may be able to make adjustments to accommodate the one egg you have. Consider reducing the other ingredients proportionally to maintain the recipe's consistency. For example, if the recipe also calls for two cups of flour, you could halve the entire recipe to use just one egg and one cup of flour.
Use egg substitutes: There are various egg substitutes available, such as applesauce, mashed banana, yogurt, buttermilk, or commercial egg replacers. These can work well in some recipes, especially when used as a binding agent. Be sure to check the best substitute for the particular dish you are making.
Make an egg substitution: In some recipes, you may be able to use other ingredients as an egg replacement. For example, you can use 1/4 cup of unsweetened applesauce or 1/4 cup of mashed banana to replace one egg in certain baked goods.
Adjust the recipe to use the single egg creatively: If the recipe allows for it, you might consider using just one egg in a different way than intended. For instance, if the recipe calls for two eggs to be added separately, you could try using the single egg with additional liquid (like milk) to create a different consistency.
Borrow from a neighbor or friend: If possible, you could ask a neighbor or friend if they have an extra egg you can borrow to complete the recipe as originally intended.
Keep in mind that the result may not be identical to the original recipe when making substitutions. The taste, texture, and consistency may vary slightly, but it can still turn out delicious and satisfying.