Baking Steel
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“Since most people don't have wood-fired ovens (lucky for me, I do), the next best thing is a Baking Steel, a quarter-inch thick slab of steel you use as a baking surface instead of a stone (steel is way more conductive than ceramic, so pies cook in about half the time on one).”
Andrew Janjigian Interview, Senior Editor (Cook's Illustrated), bread baking instructor (King Arthur) · via Uses This