Peanut (Groundnut) Oil
What it is
Oil pressed from peanuts (Arachis hypogaea), available refined (neutral, very high smoke point) or unrefined/roasted (golden, with a pronounced roasted-peanut aroma). A workhorse frying oil across China, Southeast Asia, and West Africa.
How it's made
Refined oil is expeller-pressed and refined; aromatic versions are pressed from roasted nuts and left unrefined.
Flavor profile
Refined peanut oil is clean and mild; roasted/unrefined peanut oil is nutty and fragrant. Smoke point: refined ~230°C (one of the highest among common plant oils), unrefined lower (~160°C).
Culinary uses
The classic Chinese stir-fry and deep-frying oil — its high smoke point suits the searing heat of the wok, and refined versions tolerate repeated frying well. Aromatic peanut oil finishes dishes and dresses noodles. In West African cooking, groundnut paste and oil thicken and enrich stews like maafe. Note: a genuine allergen concern, though highly refined peanut oil contains little allergenic protein.
Regional variations
Chinese cooking favors high-heat refined peanut oil; some regional Chinese and Southeast Asian cooks prize fragrant pressed peanut oil; West African cuisine leans on groundnut as paste and oil alike.
Cultural & historical context
The peanut is South American in origin, carried to Africa and Asia via Portuguese trade, where it was so thoroughly adopted that "groundnut stew" reads as quintessentially West African. The oil became the default high-heat fat of much of East Asian frying.
Why it can't be substituted — In high-heat wok cooking, the combination of smoke point and faint nuttiness matters; in maafe, groundnut is the dish's defining flavor, not a generic fat.
Reference notes
- Tags: `nut-oil`, `high-smoke-point`, `frying-oil`, `east-asian`, `allergen`
- Related ingredients: groundnut paste, sichuan peppercorn, scotch bonnet
- Related cuisines: Chinese, West African, Southeast Asian
- Suggested Cuisinopedia links: `maafe`, `chili-oil`, `wok-hei`
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