Fu vegetable, fu cai, is one of the foundational preserved ingredients of Hakka Taiwanese cuisine, alongside the related sour mustard greens and mei cai. It is made from large mustard greens, salted and fermented to start, then sun-dried and aged, the Hakka preservation tradition born of the group's history as poor, land-poor migrants who needed to keep vegetables through the year without refrigeration. The result is a deeply savoury, slightly sour, umami-rich preserved green, less salty than mei cai and less sour than the fresh-pickled suan cai, with a distinctive sweet-fermented depth. Fu cai is rarely eaten alone, it is a seasoning and structural ingredient, the backbone of Hakka soups, especially the famous fu cai pork rib soup, and of braises where it melts into the sauce giving body and depth. The Hakka settlements of Hsinchu, Miaoli and Meinong all make their own, and the ingredient is so identified with Hakka cooking that it is sometimes called Hakka vegetable. The making is a winter ritual, the greens preserved at harvest to last the year.
A deeply savoury, slightly sour, umami-rich preserved green, the texture soft and yielding, with a complex sweet-fermented depth unlike fresh vegetable. Eaten in soups and stews where it has melted into the broth, giving body and a long savoury finish.
The making is a controlled lactic fermentation followed by drying. Mustard greens are harvested, wilted, salted heavily and packed into a vessel, where lactic-acid bacteria ferment the sugars, producing lactic acid that preserves the greens and gives the sourness. After a few days of fermentation, the salted greens are removed, sun-dried until partially dehydrated, then packed into jars or tied into bundles to age further, the partial drying concentrating the flavour and the continued slow fermentation developing the sweet-savoury depth. The final fu cai is less salty than fully dried mei cai and less sour than the wet suan cai, a middle state prized for soups. In cooking, fu cai is soaked to remove excess salt, then added to pork-rib soups, where its long, slow simmer extracts the savoury, slightly sour flavour into the broth, the greens themselves softening into the soup, or it is stir-fried with pork. The preservation tradition is the Hakka answer to year-round vegetable supply without refrigeration, and the deep umami of fu cai is the fermentation's gift.
Variations
Mei cai is the fully-dried version, more intensely flavoured. Suan cai is the wet, freshly-fermented version. Fu cai is sometimes stuffed into duck or pork dishes.
On the Palate
Where Fu Vegetable sits in the Taiwanese flavor cloud
Ingredients
Serves 4How it's made
6 steps · 30 min
- 14 min
Soak 100g fu cai in water for 20 minutes to remove excess salt, then drain and cut into pieces.
Watch outSoak the fu cai and taste it — pull it once the harsh salt is gone; it seasons the whole broth, so don't over-soak either.
- 24 min
Blanch 300g pork ribs; rinse clean.
- 35 min
Heat a little oil, stir-fry 3 slices ginger and 2 cloves garlic briefly, add the pork ribs and stir-fry until coloured.
- 48 min
Add 1.5 litres water and the fu cai; bring to a boil, skim, then simmer gently for 45 minutes until the pork is tender and the broth deeply savoury.
Watch outSimmer gently and skim — a rolling boil clouds the broth; you want it clear and deeply savory.
- 53 min
Season with a little salt only if needed, the fu cai itself is salty.
- 64 min
Serve hot in bowls, the softened fu cai and tender ribs in the savoury broth.
