Dưa Chua Recipe - Vietnamese Pickled Mustard Greens

Ingredients

• 907 g (2 lb)large head of gai choi (Asian mustard greens)
• 1 mediumonion, sliced
• 3.8 L (16 cups)water
• 60 ml (4 tbsp)salt
• 150 ml (10 tbsp)sugar
• 30 ml (2 tbsp)vinegar

Instructions

1. 1

   Clean and dry

   Separate the gai choi leaves and wash them thoroughly under running water. Leave them to dry on the counter for 10–16 hours, or in the sun for 6–8 hours.

2. 2

   Cut the vegetables

   Cut the leaves and onion into pieces about 2.5 cm (1 inch) long, or to your preferred size.

3. 3

   Make the brine

   Put the water, salt, sugar and vinegar in a pot and heat until almost boiling. Turn off the heat and let the liquid cool until it is still hot but comfortable to touch without burning yourself.

4. 4

   Pickle the greens

   Add all the vegetables to the pot, ensuring they are submerged; alternatively, put everything in a jar. Leave the container in a warm place, such as a windowsill or an oven with its light on. Taste a piece every 24 hours, and when it is sour enough for you, transfer it to the fridge.

What is dưa chua?

Dưa chua is a Vietnamese pickled vegetable side, commonly made with mustard greens. It has roots in the everyday practice of preserving vegetables, and its tangy, lightly sweet taste pairs especially well with rich or salty food.

This version combines gai choi with onion in a simple sweet-and-sour brine. The greens are dried before pickling, which helps keep their texture pleasantly firm.

Nutrition and macros by portion

The nutrition label shows one serving as written: 144 calories, 5g protein, 33g carbs, 1g fat.

The greens and onion provide most of the carbohydrates, while the sugar adds more; the recipe’s listed nutrition gives 5 g of protein and 1 g of fat per serving. Since this is a pickle side, serve it with a source of protein and a filling staple such as rice to make a more balanced plate.

Choosing and preparing the greens

Gai choi: Look for a large, fresh head of Asian mustard greens with crisp leaves. Separate the leaves and wash away grit carefully before drying them.

Drying: Letting the greens dry for the stated time removes surface water. Keep them in a clean place while they dry, especially if leaving them out for several hours.

Getting the brine right

Warm liquid: Heat the water with the salt, sugar and vinegar until it is almost boiling, then switch off the heat. The brine should cool until it is hot but safe to touch before the vegetables go in.

Submerging: Keep all the greens and onion beneath the liquid so they pickle evenly. A jar can make it easier to keep the vegetables together and covered.

How to judge the pickle

Sourness: Taste a piece every 24 hours rather than relying on a fixed pickling time. Move the container to the fridge once the flavour is sour enough for you.

Texture: The finished greens should remain crisp rather than turn limp. Cutting the leaves and onion into similar-sized pieces makes them easier to serve and taste consistently.

Serving dưa chua

Pairing: Serve the pickles with salty braised meats, rice, or other savoury Vietnamese dishes. Their sourness and crunch bring contrast to a rich plate.

Portioning: Lift out only what you plan to eat and let excess brine drain back into the container. A small side portion can add a sharp, crisp element without overwhelming the main dish.

Timing and temperature

Drying time: The greens need 10–16 hours on the counter or 6–8 hours in the sun before cutting. Plan for that step ahead of time.

Pickling time: The recipe does not specify a set number of hours for fermentation. Warmth and personal taste affect how quickly the greens become sour, so check them every 24 hours and refrigerate when ready.

Recipe notes & tips

• Wash between the leaves to remove grit lodged in the folds.
• Dry the greens thoroughly before cutting them.
• Cut the onion and leaves into similarly sized pieces for easy serving.
• Make sure every piece of vegetable stays beneath the brine.
• Taste at 24-hour intervals and refrigerate as soon as the sourness suits you.

Variations

• More onion: Add extra sliced onion for a stronger onion presence.
• Less sweet: Reduce the sugar if you prefer a sharper pickle.
• Milder flavour: Taste sooner and refrigerate while the greens are less sour.
• Larger pieces: Cut the greens into bigger pieces for a chunkier side.
• Smaller pieces: Chop the vegetables more finely for easier serving alongside rice.

Common mistakes to avoid

• Skipping the drying: Wet leaves can dilute the brine; give them the full drying time.
• Heating to a rolling boil: The method calls for almost boiling; turn off the heat before it reaches a full boil.
• Adding vegetables too soon: Let the brine cool until it is hot but safe to touch before adding them.
• Leaving greens exposed: Unsubmerged pieces may pickle unevenly; keep all the vegetables under the liquid.
• Waiting too long to taste: Check every 24 hours and refrigerate once the sourness is right for you.

How to store

Once the pickle reaches your preferred sourness, transfer it to the fridge in its brine and keep the container covered. Use a clean utensil when serving, and discard it if you notice mould, an unusual smell, or other signs of spoilage.

Frequently asked questions