Now, let's get into the science-y stuff. Egg whites are made up of about 90% water and 10% protein, which makes them perfect for adding moisture and structure to cookies. When you use egg whites in place of whole eggs, you'll need to adjust the liquid content in the recipe, as they have a higher water content than whole eggs.
But, here's the thing: using egg whites can result in a softer and more delicate cookie. And, let's be real, who doesn't love a soft and chewy cookie? It's like a party in your mouth, and everyone's invited! Just remember, when using egg whites, you might need to add a little more leavening agent to help the cookies rise.
Now, I know what you're thinking: what about the flavor? Will using egg whites make my cookies taste like, well, egg whites? The answer is, not necessarily. You can still add all the flavorful ingredients you love, like vanilla, chocolate chips, or nuts, to give your cookies a delicious taste. And, if you're feeling fancy, you can even add a little egg yolk to give them a rich and creamy flavor.
Cookie Science: How Do Eggs Affect My Cookies?