Question

What are the benefits of using flaxseed oil to season Cast Iron skillets? Does it go rancid like other oils would in time?

Answer 1

Flaxseed oil is a popular choice for seasoning cast iron skillets due to its high smoke point and its ability to polymerize and create a durable non-stick coating. Here are some benefits of using flaxseed oil for seasoning cast iron:

1. Non-stick properties: Flaxseed oil forms a natural non-stick coating on the cast iron surface when properly seasoned. This makes it easier to cook with and clean the skillet after use.

2. High smoke point: Flaxseed oil has a relatively high smoke point, typically around 225°C (437°F), which makes it suitable for seasoning cast iron at high temperatures without breaking down or producing excessive smoke.

3. Polymerization: Flaxseed oil has a unique property where it can polymerize and harden when exposed to heat. This process creates a durable, long-lasting seasoning layer on the cast iron, enhancing its non-stick properties over time.

However, it's worth noting that flaxseed oil does have some considerations:

1. Rancidity: Flaxseed oil is prone to rancidity due to its high unsaturated fat content, specifically its omega-3 fatty acids. When exposed to air, light, and heat, flaxseed oil can oxidize and become rancid. Rancid oil can have an off smell and taste and is not desirable for consumption.

To prevent rancidity, it's important to properly care for your seasoned cast iron skillet. After each use, clean the skillet gently using a non-abrasive brush or sponge, and dry it thoroughly. Additionally, store the skillet in a cool, dry place away from direct sunlight.

Some experts recommend re-seasoning the cast iron skillet periodically to maintain its seasoning layer. This involves applying a thin layer of flaxseed oil and baking it in the oven at a low temperature for a specified time. By regularly re-seasoning, you can help maintain the non-stick properties of the cast iron skillet and reduce the risk of rancidity.

It's worth mentioning that there are other oils commonly used for seasoning cast iron, such as vegetable oil, canola oil, or grapeseed oil. Each has its own benefits and considerations. Ultimately, the choice of oil for seasoning a cast iron skillet comes down to personal preference and availability.