Leaving bacon grease or any other cooking oil in a cast iron skillet for an extended period is generally not recommended. While cast iron is known for its durability and ability to handle fats, oils, and seasoning, leaving grease in the skillet can lead to several issues:
Rancidity: Over time, the bacon grease can become rancid, producing an unpleasant smell and taste. Rancid oil is not suitable for cooking and can negatively affect the flavor of your food.
Attracting Pests: Leaving grease in the skillet can attract pests like insects and rodents, which may be drawn to the food particles or the smell of the grease.
Impact on Seasoning: The excess grease can interact with the existing seasoning on the skillet, potentially leading to uneven seasoning or degradation of the non-stick surface.
Risk of Spoilage: Storing fats or oils, especially animal-based fats like bacon grease, at room temperature for an extended period can increase the risk of spoilage and bacterial growth.
To properly care for your cast iron skillet and maintain its seasoning, it's best to remove excess grease after cooking. Here's how to do it:
Allow Grease to Cool: Let the skillet cool down after cooking. Avoid pouring cold water into the hot skillet, as it can cause thermal shock.
Pour Off Excess Grease: Tilt the skillet carefully and pour off the excess grease into a heat-resistant container. You can save the bacon grease for other cooking purposes if desired, but make sure to strain it to remove any food particles before storing it in a sealed container.
Wipe with Paper Towel: Use a paper towel or a soft cloth to wipe off any remaining grease and food residue from the skillet's surface.
Hand Wash with Minimal Soap: Wash the skillet by hand using warm water and a small amount of mild dish soap. Avoid using harsh detergents or soaking the skillet in water.
Dry Thoroughly: After washing, dry the skillet completely with a clean towel. Place it on a low flame to ensure any remaining moisture evaporates.
Apply a Thin Layer of Oil: Once the skillet is dry, apply a thin layer of oil to the cooking surface to maintain its seasoning and protect it from moisture. You can use a small amount of cooking oil, shortening, or even the saved bacon grease for this purpose.
By following these steps, you can ensure that your cast iron skillet stays in good condition and continues to provide excellent cooking performance for years to come.