Porcelain is the finest and most precious of all bakeware materials. Made In’s porcelain bakeware is made from a 202 year old recipe held by skilled artisans in the Loire Valley. Kanolins, clays, quartz, and feldspars are mixed, shaped, enameled, and baked three times for over 50 hours at temperatures exceeding 2500°F. This process results in bakeware that is naturally non-stick, with even heating to ensure even baking. It also is thermal shock resistant so that it can go from freezer to oven to table. The oval baker will perfectly bake savory and sweet dishes such as gratins or cobblers.