Pampered Chef stoneware will naturally season over time. As it is used, it will develop a nonstick surface. One way to expedite this process is by baking with high-fat foods, or brushing the stoneware lightly with a non-aerosol cooking oil for the first few uses.
Stoneware from Pampered Chef is pre-seasoned, meaning that no additional seasoning needs to take place. The products maintain their non-stick seasoning by remaining out of the dishwasher, and away from soap or detergent. As they become darker with use, the seasoning is built up and the product's non-stick properties are improved. Hot water can be used to clean stoneware, in combination with a silicon tool that can scrape off food residue.
Other stone bakeware probably does need to be seasoned before use, unless the manufacturer says otherwise. To season most stone bakeware, treat it like cast iron and rub cooking oil on the surface of the product. When stoneware is glazed, it is often dishwasher and microwave safe, but this is not the case with all products. Pampered Chef stoneware is microwave-, freezer- and oven-safe only. It is heat resistant to about 450 degrees Fahrenheit.
Pampered Chef stoneware is known for heating evenly and efficiently when used in baking.