Vanilla
Vanilla comes from the cured seed pod of a climbing orchid (Vanilla planifolia), making it the only spice derived from an orchid anywhere in the world. Its famously labor-intensive production — including hand-pollination of every flower — is a large part of why true vanilla remains one of the most expensive spices by weight.
Where It Comes From
Vanilla orchids need a genuinely tropical, humid climate and a supporting structure to climb, and outside their native range each flower must be hand-pollinated within a single day of opening or it won't set a pod at all. This isn't a practical home garden crop for the vast majority of growers — nearly everyone encounters vanilla only as a cured, purchased bean or extract.
Culinary Uses
Whole vanilla beans, split and scraped, deliver the deepest, most complex flavor for custards, ice cream, and baked goods, with the tiny black seeds themselves prized as much for their flecked appearance as their flavor. Vanilla extract, made by steeping beans in alcohol, is the far more common and convenient form for everyday baking.
Don't throw away a scraped vanilla bean pod — it still holds plenty of flavor and can be buried in a jar of sugar to make fragrant vanilla sugar over a few weeks.