How to Restore a Rusty Cast Iron Dutch Oven (Step by Step)

To restore a rusty cast iron Dutch oven, scrub off the rust with steel wool and a little dish soap, rinse, and dry it completely on the stove. Then rub a very thin coat of oil over every surface and bake it upside down at 450 to 500°F for one hour. Repeat the oil-and-bake step two or three times to build a new, even seasoning. Unless the pot is cracked or warped, almost any cast iron Dutch oven can be saved this way in an afternoon.

This guide is for bare cast iron Dutch ovens, such as Lodge and most camp ovens. Enameled Dutch ovens (Le Creuset, Staub, and similar) need different care. See the section on enameled pots near the end.

What You Need

• Steel wool or a stiff scrub brush (a chain mail scrubber works too)
• Dish soap and hot water
• White vinegar, only for heavy rust
• Paper towels or lint-free cloths
• A high smoke point oil: vegetable oil, canola, Crisco, or flaxseed
• An oven and a sheet of foil or a baking sheet
• Oven mitts

Step 1: Check the Damage

Look over the whole pot, including the lid, the handles, and the bottom. Light orange rust, flaking seasoning, and sticky spots can all be fixed. A crack through the metal, or a pot that wobbles on a flat surface, cannot be fixed safely at home. A cracked Dutch oven can break further when heated, so retire it.

Step 2: Remove the Rust

Wet the pot with hot water, add a few drops of dish soap, and scrub the rusty areas with steel wool until you see dull gray metal. Don’t worry about scrubbing off old seasoning. You will rebuild it.

For heavy rust, mix equal parts white vinegar and water and soak the pot for 30 minutes to 1 hour. Check it often and don’t leave it overnight, because vinegar eats into the iron itself. Scrub again, then rinse well to stop the vinegar.

Step 3: Wash and Dry Right Away

Wash the pot once more with warm, soapy water and rinse it. Dry it with a towel, then set it on a burner over low to medium heat for 5 to 10 minutes until every bit of moisture is gone. Bare cast iron can flash rust within minutes if it stays damp, so don’t skip this step.

Step 4: Oil Every Surface Thinly

While the pot is still warm, add about a teaspoon of oil and rub it over the inside, the outside, the handles, and both sides of the lid. Then take a clean paper towel and wipe it all off, as if you had used too much. The pot should look dry, not shiny. Thick oil turns sticky and gummy in the oven.

Step 5: Bake the Seasoning On

Put a sheet of foil on the lower rack to catch drips. Place the pot and the lid upside down on the middle rack and bake at 450 to 500°F for one hour. Turn the oven off and let the pot cool inside. Open a window, because seasoning gives off some smoke.

Step 6: Repeat Two or Three Times

One coat gives a light brown finish. Repeat steps 4 and 5 two or three more times for a deep, even black that resists rust and sticking. The more you cook with the pot, the better the seasoning gets.

Restoration at a Glance

Troubleshooting

The seasoning is sticky

Too much oil was left on, or the oven was not hot enough. Put the pot back in a 450°F oven for another hour. If it is still tacky, scrub the sticky layer off and season again with a thinner coat.

Rust came back after a few days

The pot was stored damp, or the seasoning is too thin. Dry it on the stove after every wash, wipe on a drop of oil, and store it with the lid slightly open or with a paper towel inside so air can move.

Food tastes metallic

The seasoning is still thin. Cook a few fatty foods, like bacon or shallow-fried potatoes, and avoid long acidic simmers such as tomato sauce until the surface turns dark and smooth.

What About Enameled Dutch Ovens?

Enameled pots don’t need seasoning, and you should never use steel wool, vinegar soaks, or oven seasoning on them. For stains, simmer water with a few tablespoons of baking soda, then scrub gently with a non-scratch sponge. Rust can form on the bare rim where the enamel ends. Dry the rim well and rub on a drop of oil. If the inside enamel is chipped and the iron shows through, stop cooking in it. Read more in our guide on how to clean an enamel Dutch oven.

How to Keep It From Rusting Again

1. Wash with warm water and a little soap, and don’t soak the pot or put it in the dishwasher.
2. Dry with a towel, then heat on the stove for a few minutes.
3. Wipe a thin layer of oil inside while it is warm.
4. Store it in a dry place with the lid ajar.
5. Cook in it often. Regular use is the best way to keep seasoning strong.

For everyday cleaning, see how to clean cast iron Dutch ovens. The same rust method also works for skillets, as covered in how to clean a rusty cast iron skillet.

Frequently Asked Questions

Is it safe to cook in a Dutch oven that had rust?

Yes, once the rust is scrubbed off and the pot is seasoned again. A little rust is not toxic, but it gives food an off taste and keeps spreading if you leave it.

Can I use soap on cast iron?

A small amount of mild dish soap is fine. Modern soaps don’t strip baked-on seasoning. What damages cast iron is soaking it in water or leaving it wet.

What is the best oil to season a Dutch oven?

Any neutral oil with a high smoke point works, such as vegetable oil, canola, or shortening. Flaxseed gives a hard finish but can flake if you put it on too thick. Our guide on which oil is best to season cast iron compares them.

How long does it take to restore a Dutch oven?

Light rust takes about 1.5 hours, including one round of seasoning. A badly rusted pot with three coats of seasoning takes most of an afternoon, but most of that time is the oven doing the work.

Can a cracked cast iron Dutch oven be fixed?

Not safely at home. Welding cast iron is hard to do well, and a cracked pot can break when it is heated or filled with hot food. Replace it.