The Pampered Chef Microwave Stoneware Egg Cooker Absorbs and retains heat for even baking and golden crusts. Draws moisture away from food so it cooks light and crispy. Virtually nonporous, so it doesnt retain oils, odors or flavors. Nonstick seasoning builds up with every use: the darker it looks, the better it cooks! Microwave-, freezer-, conventional and convection oven-safe.