Reconstruction
Perilla oil, or deulgireum, is pressed from the small seeds of Perilla frutescens, an aromatic plant cultivated in Korea and elsewhere in East Asia. It should not be confused with sesame oil: the two often occupy neighboring places in Korean kitchens, but perilla oil has a greener, earthier character and a particularly high proportion of alpha-linolenic acid. Perilla itself has a history extending well before the fifteenth century. Archaeobotanical finds support its early use in East Asia, although seeds alone do not prove that people were extracting oil from them.
Joseon-period agricultural and medical writing provides firmer evidence that perilla was a recognized crop. The exact significance of 1443 is less secure: it may serve as a fifteenth-century documentary marker, but it should not be treated as the year perilla oil was invented. Oil extraction could have preceded surviving written references by centuries. Nor does evidence for cultivating the plant automatically establish every later culinary use. Detailed descriptions of Korean oil pressing and recipes become clearer in later written and ethnographic records.
Traditional production begins by cleaning and drying the seeds. For the strongly flavored culinary oil familiar today, producers roast them carefully before pressing. Heat develops the characteristic nutty, toasted aroma and can improve oil yield, but scorching creates bitterness. The expressed oil is allowed to settle and may be filtered. Historical presses varied, and the mechanical expeller described in the accompanying recipe is a modern implementation rather than a demonstrated fifteenth-century appliance. Contemporary producers also sell unroasted or lightly roasted cold-pressed oil with a milder flavor.
Korean cooks use deulgireum as both an ingredient and a finishing oil. It seasons namul, including leafy vegetables and edible shoots, and complements mushrooms, noodles, soups and braised foods. The ground seed is also used independently, so references to perilla seasoning do not always mean liquid oil. Because the oil is intensely aromatic, modest quantities can shape an entire dish. This made pressed seed a concentrated source of both energy and flavor, though access historically depended on household cultivation, regional production and the cost of pressing.
Its nutritional composition also creates a practical weakness. Perilla oil is rich in oxidation-sensitive polyunsaturated fats, especially omega-3 alpha-linolenic acid, and deteriorates more rapidly than many less unsaturated oils. Modern producers therefore favor dark containers, limited exposure to heat and air, and refrigeration after opening. Mechanized pressing has increased consistency, while artisan roasting preserves pronounced regional and shop-specific flavors. Deulgireum survives not as an unchanged medieval product, but as a durable Korean oil tradition repeatedly adjusted to new equipment, storage practices and consumer tastes.
Nutrition
| Nutrient | Amount | Basis |
|---|---|---|
| Energy | 884 kcal | referenced |
| Protein | 0 g | referenced |
| Fat | 100 g | referenced |
| Carbohydrate | 0 g | referenced |
| Fibre | 0 g | referenced |
| Glycaemic index | Not established | insufficient evidence |
| Glycaemic load | 0 | calculated |
| Micronutrients | ||
| vitamin E | 3–8 mg | estimated |
Typical serving: approximately one teaspoon used as a seasoning or finishing oil
Historical context
Korea was governed by King Sejong of the Joseon dynasty from the capital Hanseong. The court promoted practical scholarship, agronomy, medicine and standardized knowledge; the Korean alphabet was completed under royal sponsorship in 1443 and formally promulgated in 1446. Korean farming combined wet-rice agriculture with dry-field grains, legumes and oilseeds, while diplomatic and commercial connections linked the peninsula to Ming China, Japan and wider Northeast Asian exchange networks.
Evidence
Archaeobotanical
ModerateArchaeological perilla seeds support a long history of plant use and cultivation in East Asia, including periods earlier than Joseon, but seeds do not directly demonstrate oil extraction.
Written sources
ModerateJoseon agricultural and medical literature documents perilla as a known crop, while the precise textual basis for assigning perilla oil specifically to 1443 remains uncertain.
Recipe evidence
LimitedClear descriptions of culinary applications and pressing practices are better supported by later Korean recipes and production traditions than by a securely identified recipe from 1443.
Food identification
StrongModern Korean deulgireum unambiguously denotes edible oil pressed from perilla seeds, although historical references to perilla seasoning may sometimes concern whole or ground seed instead.
Dating
LimitedThe fifteenth-century setting is plausible for documented cultivation, but 1443 is not securely established as the oil's date of origin or first attestation.
Preparation method
ProbableCleaning, roasting, pressing and settling are well-supported traditional and modern practices; the particular press design used in fifteenth-century households cannot be reconstructed from the supplied information.
Geographic attribution
ModeratePerilla oil is firmly embedded in Korean cuisine, but perilla cultivation and oil use are not exclusive to Korea and belong to a wider East Asian history.
Historical interpretation
ModerateIts importance as a concentrated culinary fat and aromatic seasoning is defensible, but claims about prevalence across social classes or specific use in fifteenth-century royal cookery require more precise documentation.
Limitations
- moderatedate start/date end
The exact year 1443 is not a securely established origin date for perilla oil. Perilla was used in East Asia much earlier, while a specific first Korean attestation of extracted culinary oil requires verification against the relevant Joseon text.
- moderaterecipe
The mechanical press, dark bottle and refrigeration describe sound modern production and storage practices, not a demonstrated fifteenth-century preparation system.
