The lip or raised edge on a cast iron pan serves multiple purposes, and it's commonly known as the "rim" or "flange." Here are the main reasons for the lip on a cast iron pan:
Pouring and Drip Control: The primary purpose of the lip is to facilitate pouring liquids or foods from the pan without spilling or dripping. When you tilt the pan to pour out liquids or transfer cooked food to a plate or serving dish, the lip helps direct the flow and prevents the contents from spilling over the sides.
Retaining Heat and Juices: The raised edge helps retain heat and keeps liquids or juices from easily splattering or escaping the pan during cooking. This can be particularly useful when searing meats or cooking dishes with sauces or gravies.
Versatility: The lip adds versatility to the cast iron pan, allowing you to use it for not only frying and sautéing but also for cooking dishes that involve liquids or sauces, such as stews, curries, and even baking.
Stacking and Storage: The lip also enables easy and stable stacking of multiple cast iron pans, making it convenient for storage in your kitchen.
Aesthetic and Traditional Design: The lip is a characteristic feature of traditional cast iron pans, adding to their classic and rustic appearance.
While not all cast iron pans have a lip, it is a common design element found in many traditional and modern cast iron cookware pieces due to its practical benefits and historical significance.