
Nutmeg is the dried seed kernel of the tree Myristica fragrans, a warm aromatic spice grated to powder immediately before use.
Fine and dusty on the surface, it finishes warm and slightly sweet, with a pungent, penetrating fragrance and a faint woody bitterness.
Bartenders grate it fresh from a whole seed straight over the surface of creamy, foamy or hot drinks, a pinch functioning as a finishing aromatic top-note rather than a structural ingredient; it is dosed sparingly, since high amounts are toxic.
Mace, the aril of the same seed, reproduces most of the warm nutmeg aroma with a slightly more perfumed, delicate balance; no unrelated spice rebuilds the specific character, and pre-ground nutmeg is only a weaker version of the same thing.
Mace
Nutmeg is the dried seed kernel, while mace is the dried reddish aril that laces around the same seed. Both come from Myristica fragrans and share a warm woody-sweet character, but they are separate spices, with mace generally more delicate and perfumed.
The same tree yields two spices: nutmeg from the dried seed and mace from its reddish aril. Whole nutmegs are greenish-brown furrowed ovoids of roughly 5–10 g, dried until the kernel rattles in its shell; the flavour lives in a volatile oil making up 5–15% of the kernel, carried chiefly by the terpenes sabinene, alpha- and beta-pinene alongside terpinen-4-ol and an ether fraction led by myristicin.
Once grated the volatile oils oxidise and dissipate fast, so keep the whole seed intact and grate to order rather than storing it ground.
Myristica fragrans is native to the Banda Islands of Maluku (the Moluccas, or Spice Islands) in Indonesia, still a principal producer, with further cultivation in Grenada and in Kerala, southern India.