Steam injection is the introduction of water vapour into an oven during baking or cooking. In bread baking, steam keeps the dough surface flexible during the early stage of baking, allowing the loaf to expand before the crust sets. It can also contribute to a glossy, crisp crust once the steam is vented and the surface dries.
At the start of baking, steam condenses on the cooler dough surface and delays early crust formation. This allows the loaf to expand during oven spring. As baking continues and the oven is vented or the steam dissipates, the surface dries and browns, helping create the finished crust.
Steam injection introduces humidity into the oven during a defined stage. Dry baking uses hot air without added steam. The correct approach depends on the product: some pastries and enriched doughs benefit from a dry environment, while lean breads often benefit from early steam.
Chef’s tip: Use the oven’s designed steam system and follow the manufacturer’s instructions. If baking without a steam-injection oven, a covered Dutch oven can trap moisture from the dough; avoid improvised methods that risk burns or damage to the oven.
Key distinction: Steam injection controls oven humidity during baking; it is not simply spraying water onto bread after it has baked.
This term is one of hundreds covered in depth across OCS courses, learning paths, and 1-on-1 coaching with Chef Eric.
