Cleaning a cast iron grill pan with baked-on grease requires a bit of effort, but it can be done effectively using the following steps:
Let the pan cool: Allow the grill pan to cool down completely before cleaning. Working with a hot pan can be dangerous and may not yield the best results.
Scrape off loose debris: Use a stiff brush or a plastic scraper to remove any loose food particles or grease from the surface of the grill pan. Be gentle to avoid scratching the seasoning.
Rinse with hot water: Rinse the pan under hot water to remove any remaining loose debris. Avoid using soap at this stage, as it can strip away the seasoning.
Apply a cleaning solution: Create a cleaning solution by mixing equal parts of water and white vinegar or lemon juice. You can also use a mild dishwashing detergent if you prefer. Apply this solution to the grill pan, ensuring that it covers the entire surface.
Scrub the pan: Use a non-abrasive scrub brush or a sponge to scrub the pan thoroughly. Pay special attention to the areas with baked-on grease. Apply firm pressure to remove the buildup, but be careful not to scrub too hard and damage the seasoning.
Rinse and inspect: Rinse the pan thoroughly with hot water to remove the cleaning solution. Once rinsed, inspect the pan to see if any stubborn residue remains. If necessary, repeat the cleaning process or move on to the next step.
Salt scrub: If there are still stubborn grease spots, sprinkle kosher salt or coarse sea salt on the pan. Use a damp cloth or paper towel to scrub the salt against the surface, focusing on the greasy areas. The salt acts as an abrasive without damaging the pan's seasoning.
Rinse and dry: Rinse the pan again with hot water to remove the salt and any remaining residue. Once clean, use a clean cloth or paper towel to dry the pan thoroughly.
Re-season the pan: After cleaning, it's important to re-season the grill pan to maintain its non-stick surface and prevent rust. Apply a thin layer of cooking oil or solid shortening to the pan's surface, including the sides and handle. Place the pan upside down in an oven preheated to around 350°F (175°C) for about an hour. Then, let it cool completely before storing.
By following these steps, you should be able to effectively clean a cast iron grill pan with baked-on grease and restore its cooking surface for future use.