Hadley Pottery pieces may be used in the oven with reasonable care. Sudden changes in temperature can cause damage or breakage. To avoid the risk of thermal shock: - Do not preheat. Place room temperature item and contents into room temperature oven. Bring up to desired temperature gradually. - No direct contact. Ware should not come into contact with flame or electric element. - Do not use in broiler. - Never transfer ware directly from the freezer to the oven. - Allow dish to cool before removing. If oven is at 400°F or more, let cool with door ajar for 10-15 minutes before removing your dish. - Do not bake in oval platters. They are more prone to breakage in the oven due to their flat underside.