Black pepper is made by drying the unripe berries of a flowering vine.

The longer version

Peppercorns are the fruit of a woody climbing vine grown in humid tropical regions. Left to mature fully, the berries turn red and are handled differently, but for the familiar dark spice they are picked while still green and firm, then dried until they shrivel and darken.

Drying is what creates the wrinkled black surface. The pungency comes largely from piperine, a compound concentrated in the outer layers and the seed. Grinding releases the volatile oils at the last moment, which is why pre-ground pepper loses aroma faster than whole corns kept in a closed container.

Where this entry sits

Everyday ingredients turn out to be full of quiet chemistry and long history. This collection gathers short, plain explanations of how bread rises, why onions sting, where common spices originate, and how coffee, tea, and chocolate reached the modern kitchen. The full list sits on the Food and Drink page, where every entry is listed in order.