What is steam-leavened products?

Steam-leavened products are baked goods that rely on steam as the primary leavening agent, rather than yeast or baking powder. When the dough or batter is heated in the oven, moisture turns into steam, which expands and creates a light, airy texture. Common examples include puff pastry, choux pastry, and certain types of bread, such as baguettes. The rapid expansion of steam during baking helps achieve a crisp crust and a tender interior.