Yujacha

Yuja, the citron at the heart of this tea, is Citrus junos, a fruit that originated along the upper Yangtze in China and is widely said to have reached the Korean peninsula around the Silla period before later spreading to Japan; its precise arrival is not firmly recorded. On Korea's warm southern coast the fruit found a home, and the towns of Goheung in South Jeolla and the island of Geoje became the country's yuja heartland. Too sour and too full of seeds to eat out of hand, the fragrant fruit was instead preserved with honey or sugar into a cheong that could be kept through winter and dissolved a cup at a time, a thrifty country habit that grew into one of Korea's most familiar traditional teas.

The aroma hits first, a bright burst of citrus oil from the peel that fills the nose before the first sip. The cup is sweet and honeyed up front, then turns tart and lively, with a clean bitter lift from the rind that keeps it from cloying. Soft threads of peel float in the glass, chewy and faintly chewy-sweet, and the warmth settles in the chest like a remedy. It tastes like a fragrant, restorative version of marmalade dissolved in tea.

The drink works on the principle of a sugar cure. Slicing the whole fruit thin exposes a large surface, and packing it with an equal weight of sugar or honey draws water out of the peel and pulp by osmosis, dissolving into a thick syrup. That high-sugar syrup binds the available water and starves out spoilage microbes, so the cheong keeps for months without cooking, while the resting time lets the bitter, aromatic oils in the rind mellow and marry into the syrup. Because the fragrance lives in the volatile oils of the peel, the fruit is never boiled hard, only gently cured and then dissolved in hot water, which releases the aroma without driving it off.