Perilla oil substitutes

The practical answer, and what most Korean home cooks in the West end up using. Both are dark roasted seed oils used the same way, drizzled at the end for aroma, so it slots straight into the role. What changes is the direction of the flavor. Sesame is heavier, sweeter and more deeply roasted, with a toasty richness that coats the mouth. Perilla is lighter, greener and has a cool herbal note that reads almost like mint or shiso. Spinach namul dressed with sesame oil tastes correct but rounder and more substantial, where the perilla version tastes fresher and more alive. Use slightly less than the recipe says, because sesame oil is more assertive.

Best for

namul, japchae, gimbap, bibimbap, seasoned vegetables, finishing soups

If you have perilla leaves, kkaennip, tear two or three into the finished dish. The leaf carries the same herbal note as the oil and closes most of the gap.

The closest thing you can build from ordinary shop ingredients, and noticeably better than sesame alone. The sesame supplies the roasted seed backbone and the walnut oil supplies the lighter, greener, slightly tannic top note that perilla has and sesame lacks. Blended, it stops the dish from tasting quite so heavy. Mix it in a spoon before adding rather than pouring both into the pan, so the ratio stays right.

Best for

namul, cold vegetable side dishes, rice bowls, noodle dressings, gim

Do not push past about a quarter walnut oil or the dressing starts to taste bitter and a little woody.

In flavor category this is arguably the nearest single oil, because both are delicate, cold-pressed, green-nutty oils rather than deeply roasted ones. Walnut lacks the toasted aroma perilla gets from roasting the seeds, so a dish made with it tastes clean and nutty but less perfumed, and walnut's slight tannic bitterness shows up more in a bare dressing than in a soup. Excellent over cold seasoned vegetables and in dressings. Less convincing stirred into hot stew, where you really want that roasted smell rising off the bowl.

Best for

salad dressings, cold namul, drizzling over rice, tofu dishes

Buy it small and keep it in the fridge. Walnut oil turns rancid faster than almost anything else on the shelf.

Flaxseed oil, also sold as linseed oil, is the closest thing nutritionally, since both perilla and flax are unusually high in alpha-linolenic acid, and it shares perilla's grassy, faintly marine bitterness. On its own it is too bitter and too fishy for most dishes, which is why cutting it with sesame oil works so much better than using it neat. Taste the flaxseed oil first. If it tastes like old paint it has oxidised, and it will ruin the dish rather than season it.

Best for

cold dishes, dressings, drizzling, health-focused cooking

Never heat flaxseed oil. It has a very low smoke point and degrades into something acrid almost immediately.

If your Korean grocery has the ground perilla seed, deulkkae garu, but not the oil, this gets you the actual flavor rather than an approximation. Stir the powder into warm neutral oil and let it sit for ten minutes, or just add the powder straight to the dish along with plain oil. The texture is different, slightly gritty and cloudy where the oil is clear and smooth, but the aroma is right because it is the same seed. This is also how the powder is used in its own right, thickening soups like deulkkae-tang.

Best for

soups, stews, braised greens, namul, deulkkae dishes

Perilla seed powder goes stale fast. Keep it in the freezer and smell it before use.

There are dishes where perilla oil is the entire point and any swap gives you a different dish rather than a version of the same one. Deulkkae-tang, perilla seed soup, is built on perilla. Deulgireum makguksu, buckwheat noodles dressed with nothing but perilla oil, soy and gim, has nowhere to hide. Simple gim seasoned with perilla oil and salt tastes distinctly of perilla and nothing else. The least-bad option is toasted sesame oil with a few torn perilla leaves, and the honest expectation is a good bowl of food that a Korean cook would immediately clock as not the real thing. If you can order one bottle online, this is the ingredient worth ordering.

Best for

knowing when to stop substituting

A bottle keeps a few months in the fridge, so buying it once covers a lot of cooking.