Overview

Cornmint is a perennial herbaceous species of mint native to temperate regions of Europe, Asia, and North America. Its flavor is similar to peppermint but more pungent and less sweet, with a strong, cooling menthol character. It is primarily cultivated for its essential oil, known as cornmint oil or Japanese mint oil.

Origin and history

Cornmint has a circumboreal distribution, meaning it occurs across the northern latitudes of Europe, Asia, and North America [1]. It has been used in traditional medicine across its native range, particularly in East Asia, where it is known as hakka in Japanese and bò he in Chinese. Commercial cultivation for essential oil production began in Japan in the late 19th century and later expanded to Brazil, India, and China, which is now the world’s largest producer. The plant’s common name “cornmint” derives from its tendency to grow as a weed in corn (grain) fields.

Varieties and aliases

  • Field mint
  • Wild mint
  • Corn mint
  • Japanese mint (when referring to cultivated varieties used for oil production)
  • Mentha arvensis var. piperascens (the variety commonly grown for commercial menthol extraction)

Culinary uses

Cornmint is less commonly used as a fresh culinary herb than spearmint or peppermint due to its harsher flavor. Its primary culinary application is as a source of menthol-rich essential oil, which is used to flavor confections, chewing gum, toothpaste, and liqueurs. Dried cornmint leaves are occasionally used in teas and herbal infusions. In some parts of Asia, fresh leaves are used sparingly in salads or as a garnish, though the plant is more valued for its medicinal and industrial uses than for direct cooking.

Cross-cuisine context

Cornmint has no direct analogue in Mexican cuisine, where the dominant mint is yerbabuena (spearmint, Mentha spicata), used in dishes like sopa de lima and agua de yerbabuena. In other LA-relevant cuisines, cornmint is closest to the mint varieties used in Vietnamese rau thơm herb platters (typically spearmint or peppermint) and in Persian sabzi khordan (fresh herb platters, which use spearmint or peppermint). Cornmint’s stronger menthol profile makes it a less common substitute for these culinary mints. In Japanese cuisine, cornmint oil is used in some regional confections and in the production of shu (liqueurs), but fresh leaves are not a standard culinary herb.

Notes for cooks

  • Cornmint is not a direct substitute for spearmint or peppermint in recipes. Its flavor is more aggressive and medicinal. Use sparingly if substituting.
  • The essential oil is highly concentrated. A single drop can overpower a dish. Dilute in a carrier oil or alcohol before use.
  • Fresh leaves have a short shelf life. Store wrapped in damp paper towels in a sealed bag in the refrigerator for up to five days.