Gotgam (Dried Persimmon)

Name: Gotgam (Dried Persimmon)
Prep time: 1 h 30 min
Total time: 1 h 30 min
Yield: 20 servings
Cuisine: Korean
Ingredients: 20 astringent persimmons; 10 m cotton string; 100 ml soju or vodka

Astringent persimmons, peeled and hung for two months. The surprising part is that the astringency is never removed: nothing is washed out and nothing is added, but as the fruit dries its tannins link into molecules too large to grip the proteins in your saliva. The sugar that was always there suddenly reads as sweetness. The white dust that settles on the surface is not mould but that sugar, drawn out with the water and left behind as crystals.

Ingredients

20servings

Ingredients (makes 20)
astringent persimmons · Hachiya type; sweet (non-astringent) varieties will not work20
Equipment
cotton string · to tie the stems for hanging10 m
soju or vodka · in a spray bottle; keeps mould off in the first few days100 ml

Steps

Use astringent persimmons. Sweet varieties soften to jelly as they ripen and cannot be hung; astringent ones dry while the flesh is still firm, so they hold their shape. Pick fruit that is fully orange but still hard to the thumb.
⏲ 10 min
Cut the stem as a T. Leave about 1cm of branch either side of the calyx so there is something to tie string to. Snap the stem off and there is nothing to hang the fruit by.
⏲ 10 min
Peel every bit of skin off, thinly. Any patch left on will not lose its water and ends up a hard spot in the finished fruit. Leave only a ring around the calyx.
⏲ 30 min
Dip in boiling water for 5 seconds. This is a surface treatment only — it knocks back stray microbes and slows the darkening. Longer and the flesh cooks and goes soft.
⏲ 5 min
Tie the stems to a line and hang them so that no two fruit touch. Somewhere with moving air and out of the rain — an eaves or a balcony. Where two persimmons press together, that face stays wet and spoils.
⏲ 30 min
For the first three days, spray them lightly with soju or vodka each morning. While the surface is still wet is the only window in which mould can take hold.
⏲ 5 min
Once the outside is dry, at about two weeks, squeeze each fruit gently once a day. You are pushing the inner moisture outward and stopping the flesh setting in a lump. Skip this and the outside hardens while the middle stays damp.
⏲ 10 min
Hang them 4 to 8 weeks. They are done when they have lost about two thirds of their weight and are dry outside and chewy within. For the half-dried style, stop at around three weeks.
The white bloom is the finishing sign. It is easy to mistake for mould: sugar crystals are dry, even and odourless, while mould is fluffy, blue or black, and smells. Wrap in paper and keep them in the fridge or freezer.
⏲ 10 min

Tips & Variations

Variations

Bangeonsi (half-dried): stopped at about three weeks, so the inside is still jelly-like. Kept frozen and eaten with a spoon. It does not keep long.
Junsi and jumeoni-gotgam: pressed flat as it dries rather than hung on a skewer is junsi, the form used on formal tables — that is what the photograph shows. Hung by a string threaded through the stem is jumeoni-gotgam.
Gotgam-ssam: stoned, flattened, rolled around a walnut and sliced. A standard sweet with tea.
In sujeonggwa: sliced thin and floated in cinnamon and ginger water, or rolled with pine nuts. Put back into liquid it takes up water again and softens.
The same thing in Japan and China: Japanese hoshigaki and Chinese shibing are made the same way. Japan makes more of the daily massaging; Shaanxi presses them flatter.
Sangju and Sancheong: the two Korean regions known for it. Both need dry wind after the first frost, which is why it cannot be done just anywhere.

Tips

The astringency does not leave. This is the whole point of the dish. The tannins in an astringent persimmon are water-soluble, so in your mouth they bind the proteins in your saliva — that drying, puckering feeling is astringency. As the fruit dries, those tannins link to each other into molecules too big to grip protein, and the astringency alone disappears. It is the same binding that tea eggs use to firm the outside of an egg white, running in the other direction.
Dotori-muk takes the opposite route. Acorns are leached over days with changes of water, which carries the tannin away. Gotgam removes nothing at all and changes the tannin where it sits. Same problem, opposite solution.
The white bloom is sugar. Water travelling to the surface brings dissolved glucose and fructose with it; the water evaporates and the sugar is left to crystallise. So a well-bloomed persimmon is a well-dried one. Do not wash it off.
Why you massage them daily. Once the outside dries first, that skin traps the moisture inside. Squeezing reopens the path so the middle dries too. As with lavash, which softens again when you sprinkle water on it, moisture only ever moves — it does not vanish.
Drying here is a transformation, not just preservation. Bugak dries in order to be fried, takuan dries so that it can ferment without brine, and the pollock in hwangtae-guk dries by freezing and thawing until it is a sponge. This one dries in order to taste different.
The first three days are the whole risk. After that the surface water activity is too low for mould. Almost every failure happens early, in rain or still air.
Going dark is not spoilage. It is tannin oxidising in contact with air. The five-second dip and moving air both slow it, and it does not affect the flavour.