What Is The Best Egg Wash For Puff Pastry?

A classic egg wash is a tried-and-true method for giving pastries, breads, and tarts that beautiful, buttery, golden sheen that makes baked goods look even more craveable. There are several types of egg wash to choose from, so you just have to choose the best egg wash based on your recipe and desired results since adjusting the ingredients will produce different degrees of color, shine, and browning. When it comes to puff pastry (whether you're using store-bought or laminating homemade puff pastry on your own), an egg yolk wash is your best bet for achieving a rich color and satin-like gloss.

A textbook egg wash consists of one whole egg whisked together with a tablespoon of milk or water as well as a pinch of salt. For an egg yolk wash, whisk together one egg yolk with two teaspoons of milk or cream before gently brushing it over the dough just prior to baking. Incorporating whole milk as opposed to water increases the wash's fat content, which helps develop a richer, more golden-brown finish that's similar to the appearance of bakery-style pastries.

There are a couple of tips to keep in mind when making and using an egg yolk wash. First, make sure to whisk the egg yolk until it's fully homogenized to ensure the pastry develops an even color throughout. Don't forget to add a pinch of salt since it breaks down the protein in the egg yolk, making it even easier to brush over the dough. It also seasons the wash and subtly enhances the flavor.

Puff pastry is dough made from all-purpose flour, water, butter, and salt that enrobes a block of butter before going through a process called lamination, where the dough is repeatedly folded to achieve those layers of light, buttery, flaky dough that we love. Because puff pastry is already high in fat, an egg yolk wash complements its richness while also giving the pastry a deeper color. By comparison, if you were to use an egg white wash, the result would be a lighter crust color and a lighter flavor. It's easy to see why when you consider the egg's natural properties. The egg yolk has a higher protein content than the egg white, and when eggs are exposed to heat its the protein inside that coagulates to create that glossy coating. 

An egg wash acts as a natural glue or binding agent which helps toppings to adhere to the dough's surface, but as the say, less is more. Applying an egg wash too liberally can weigh down the surface of the dough, preventing it from rising to its full potential and achieving those flaky layers. For best results, brush the egg yolk wash over the dough in one thin, even layer and don't let it pool over the edges. This will help the pastry achieve maximum lift while ensuring a decadent, golden finish.