Lava rocks are used in baking, particularly for bread, as a method to create steam in a home oven.
 
Heat Retention: Lava rocks are known for their excellent heat retention properties. They get extremely hot and retain that heat for a long time.
 
Surface Area: Due to their jagged and irregular shapes, lava rocks have a large surface area. This is beneficial because when water is added to the hot rocks, the increased surface area allows for more steam to be generated.
 
Durability: Lava rocks don’t break down easily, even under the high temperatures of an oven
 
The rocks allow you to achieve professional bakery-quality crusts in your home-baked breads. It’s a simple yet effective technique to mimic the steamy environment of a professional baker’s oven.