Extra virgin olive oil is generally not recommended for the initial cure due to its low smoke point and strong flavor profile, but it works well for refreshing an existing surface. The ideal curing oil has a high smoke point to prevent sticky, incomplete polymerization and a balanced fatty acid profile that promotes strong adhesion and a slick, non-porous surface.
Understanding the Best Oil to Cure Cast Iron for Optimal Seasoning
After applying a microscopic layer of oil to the entire surface, including the handle and exterior, the skillet should be baked upside down in a cold oven. Vegetable shortening, such as Crisco, is a classic choice that yields a soft, dark finish and is very forgiving for beginners.
Flaxseed oil is frequently praised for its ability to create a hard, slick finish that resembles a matte glass surface, though it can be prone to oxidation over time. The curing process, often called seasoning, is a chemical reaction where oil polymerizes under high heat, forming a hard, protective layer that shields the metal from rust and provides a natural cooking surface.
Best Oil to Cure Cast Iron: Key Choices and Science
Canola oil, particularly high-smoke-point varieties, is a reliable and accessible choice that delivers a tough, flexible seasoning without imparting food flavors. Understanding the Science of Polymerization To appreciate why some oils outperform others, it is essential to understand polymerization.
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