Yes, but it is very important to understand that starting to cook with cold stoneware and cold food will affect the ramp up time of the slow cooker. Always add sufficient time into the cook time to ensure food is safe, as well as tender. It is recommended to use an instant read thermometer when cooking with chilled stoneware and chilled food to ensure food temperatures reach well above 165°F and food becomes tender. Never place your stoneware (whether it has been refrigerated or is at room temperature) in a pre-heated slow cooker base.