The Family Heritage Stoneware, Classics Collection of unglazed pieces guarantees great baking success! Stoneware duplicates the effects of brick-lined ovens used in professional bakeries and restaurants by evenly distributing heat, absorbing and circulating moisture. The results are crispier crusts, juicier roasts, and lighter, higher volume breads and cakes. The properties of natural Stoneware allow for heat retention keeping foods warm long after leaving the oven. Each Stoneware piece is created to Pampered Chef's own specifications using only the highest quality natural clay to produce one of the most durable Stoneware products available. Before firing at temperatures over 2000ºF, each piece is smoothed by hand. You will find subtle color, texture and seasoning variations with each piece of Stoneware. These unique variations are inherent properties of natural Stoneware making each piece a one of a kind. Pampered Chef's Stoneware is manufactured using lead-free clay ensuring safe meal preparation. The more you use your Stoneware, the more seasoned it becomes, gradually turning dark brown. There’s no need to presoak or preheat it. Simply place your food on the Stoneware, put it in the oven, and enjoy the cooking experience of a lifetime!