Cast Iron Cooking: The Complete Guide

Why cast iron is worth the effort

Cast iron is the most durable, most versatile, most misunderstood piece of kitchen equipment. A well-seasoned cast iron skillet can:

• Sear a steak at 700°F (the temperature of a steakhouse broiler)
• Bake cornbread with a crispy crust
• Fry chicken with even heat
• Braise a stew on the stovetop or in the oven
• Last for 100+ years (your grandmother’s skillet is still usable)

The catch is that cast iron requires different care than other pans. It’s not harder to use — it’s just different. Once you understand the rules, cast iron is the easiest pan in the kitchen.

What is cast iron?

Cast iron is iron that has been melted and poured into a mold. The result is a heavy, dense pan that heats slowly and retains heat extremely well.

The “seasoning” on a cast iron pan is a layer of polymerized oil — oil that has been heated past its smoke point until it bonds with the iron. This layer is what makes the pan nonstick, prevents rust, and adds flavor to food.

How to season a new cast iron pan

If you buy a new cast iron pan, it comes pre-seasoned (usually with vegetable oil). But the factory seasoning is thin. To build a proper seasoning:

Step 1: Wash and dry

Wash the pan with hot water and a stiff brush (no soap needed for a new pan). Dry it completely with a towel.

Step 2: Apply oil

Rub a thin layer of vegetable oil (or flaxseed oil, which polymerizes very hard) over the entire pan — inside, outside, handle included. The layer should be so thin it looks dry.

Step 3: Bake upside down

Place the pan upside down on the top rack of a 450°F oven with a sheet of foil on the bottom rack to catch drips. Bake for one hour.

Step 4: Cool in the oven

Turn the oven off and let the pan cool inside. This prevents thermal shock, which can crack the pan.

Step 5: Repeat

Repeat steps 2-4 two to three times for a new pan. The seasoning will darken and become glossy.

How to maintain seasoning

Once the pan is seasoned, maintenance is simple:

• Cook with fat. Every time you cook, use oil or butter. This adds to the seasoning.
• Don’t soak the pan. Water is the enemy of seasoning. Wash, dry, and store.
• Re-oil occasionally. After every few washes, rub a thin layer of oil on the pan.
• Re-season once a month. If the pan looks dull or food starts sticking, do the full seasoning process again.

How to clean cast iron

Cleaning cast iron is where most people get it wrong. The rules:

Do:

• Wash with hot water and a stiff brush. No soap needed for most cooking.
• Use a chainmail scrubber for stuck-on food. It removes the food without damaging the seasoning.
• Dry immediately on the stovetop. Turn the burner to medium heat for 1-2 minutes to evaporate any water.
• Oil after drying. A thin layer of oil prevents rust.

Don’t:

• Don’t soak in water. It will rust.
• Don’t put in the dishwasher. Same problem.
• Don’t use harsh soap unless the pan is really greasy. Modern dish soap is safe but not necessary.
• Don’t scrub with steel wool unless you need to strip the seasoning. Steel wool is for restoration, not regular cleaning.

The cast iron smoke point chart

The smoke point is the temperature at which oil starts to smoke. Match the oil to the cooking temperature:

Rule: If the oil is smoking before the food is cooked, the pan is too hot. If the oil is smoking after the food is in the pan, that’s normal.

What to cook in cast iron

Cast iron is best for:

High-heat searing

Steaks, pork chops, chicken thighs, fish fillets. The pan’s heat retention creates a Maillard reaction that a thin stainless pan can’t match.

Pan-frying

Fried chicken, fried pork chops, fried fish. The even heat prevents hot spots that cause uneven cooking.

Baking

Cornbread, skillet cakes, deep-dish pizza, pan pizza. The cast iron creates a crispy crust that a cake pan can’t match.

Braising

Short ribs, pot roast, beef stew. The pan goes from stovetop to oven without transferring.

Roasting

Roasted chicken, roasted vegetables. The pan retains heat so well that it continues cooking the food after it’s removed from the oven.

What NOT to cook in cast iron

Cast iron is not ideal for:

Acidic foods (long-cooked)

Tomato sauce, wine braises, lemon-heavy dishes. The acid can strip the seasoning. Use an enameled Dutch oven instead.

Delicate fish

Cast iron is too heavy for delicate fish like sole or branzino. Use a nonstick or stainless pan.

Sticky foods

Cast iron isn’t as nonstick as Teflon. For eggs, pancakes, or crepes, use nonstick or carbon steel.

The two cast iron pans every kitchen needs

If you’re building a cast iron collection, start with two pans:

1. A 10-inch or 12-inch skillet

This is the workhorse. Searing, frying, baking, roasting. If you buy one pan, make it a 10-inch or 12-inch skillet.

2. A cast iron Dutch oven

This is for braising, slow cooking, and baking bread. Enameled cast iron (like Le Creuset) is more expensive but doesn’t require seasoning. Bare cast iron (like Lodge) is cheaper but requires maintenance.

The recipes that work best in cast iron

These recipes are designed for cast iron and rely on the pan’s heat retention:

• Skillet Cornbread with Bacon Grease — the hot pan creates a crispy crust that a cake pan can’t match
• Southern Fried Potatoes and Sausage — the pan’s even heat prevents uneven cooking
• Hamburger Steaks with Brown Gravy — the pan goes from searing to gravy in one step
• Country-Fried Cubed Steak with Gravy — the pan’s fond creates the gravy’s flavor
• The Best Swiss Steak — braising in cast iron creates a deeper flavor
• Pepper Steak — the pan’s heat retention creates a proper sear

The cast iron mistakes to avoid

1. Cooking at too high heat. Cast iron takes time to heat up. Start at medium and give it 5 minutes.
2. Not preheating the pan. A cold pan will stick. Always preheat.
3. Using too little fat. Cast iron needs oil to be nonstick. Don’t try to cook with no oil.
4. Soaking the pan. Water is the enemy of seasoning.
5. Not drying the pan. If the pan has water when you store it, it will rust.