Tangy Indian Onion Chutney to Serve with Poppadoms

An epicurean adventure to: India

Remember the tangy Indian onion chutney you enjoy with poppadoms at British Indian restaurants? You can recreate that bright, zesty relish at home in minutes — no cooking required.

Known variously as red onion chutney, cold onion chutney, raw onion chutney, spiced onions or Indian onion relish, this simple recipe delivers a sharp, spicy hit and a lovely pink-red colour thanks to a ketchup-based dressing combined with finely diced raw red onion.

This onion chutney is a classic accompaniment to poppadoms and a variety of Indian appetisers. It sits alongside mango chutney and mint raita in the typical curry-house condiment selection and brings vibrant contrast to fried and grilled snacks.

With less than 10 minutes of hands-on time you can make a batch and chill it before serving. It tastes best cold straight from the fridge, and it’s perfect to prepare ahead.

Fast facts: India

What’s to love about this recipe

• Flavourful: A balanced blend of tangy and spicy notes.
• Versatile: Serves as a side for snacks and main dishes alike.
• Easy: Quick to prepare with no cooking required.
• Texture: Diced onions add a satisfying crunch.
• Dietary friendly: Naturally vegan, vegetarian and gluten-free; check your ketchup label if you have specific requirements.
• Customisable: Adjust the heat and acidity to taste.
• Restaurant-style: Recreate the chutney you enjoy at curry houses.

Key ingredient notes and substitutions

Please see the recipe card below for exact ingredient quantities.

Red onion

Red onion is traditional for colour and flavour, but white or brown onions will work. The recipe specifies the onion by weight (250g) to ensure the right sauce-to-onion ratio.

To mellow the sharpness, soak the chopped onions in ice water or very cold fridge water for 15–30 minutes, then drain and pat dry before dressing.

Tomato ketchup

Use your preferred ketchup; a low-sugar or sugar-free variety is fine. For a thicker flavour, try a mix of ketchup and tomato paste.

Cumin seeds

Toast the cumin seeds in a dry pan for about a minute until aromatic. This simple step adds significant depth — watch them closely so they don’t burn.

Chilli powder and lemon

Adjust chilli powder to control heat; a half teaspoon gives mild to medium spice. A teaspoon of fresh lemon or lime juice is optional but adds bright acidity.

How to make cold Indian onion chutney: Step-by-step

1. Dice 250 grams of red onion into small, evenly sized pieces, separating any clumps so each piece is individual.

2. If you prefer a milder onion flavour, soak the diced onions in ice water or very cold fridge water for 15–30 minutes, then drain thoroughly.

3. Toast 1 teaspoon of cumin seeds in a dry small pan over medium-high heat until fragrant and a few seeds begin to pop. Remove from heat and let cool briefly.

4. In a small bowl, mix the toasted cumin seeds with ½ teaspoon chilli powder, ½ teaspoon ground cumin, 3 tablespoons tomato ketchup, salt to taste (about ¼ teaspoon) and 1 teaspoon fresh lemon juice if using. Stir until you have a smooth, even sauce.

5. Drain and dry the onions thoroughly on kitchen paper or a clean towel.
6. Place the dried onions in a medium bowl and pour the chutney sauce over them.
7. Gently toss until all onion pieces are evenly coated.
8. Transfer the chutney to a serving bowl and refrigerate for at least one hour to let the flavours meld. Serve cold.

Top Tips

Mellow the Onions

Soak diced onions in ice water for 15–30 minutes to reduce bite, then dry well so the dressing clings properly.

Separate the onion pieces

After chopping, separate any stuck pieces so every mouthful has small, even onion bits rather than large chunks.

Balance the spice

Adjust chilli powder to taste. Remember the raw onion already contributes heat, so increase spice gradually.

Taste as you go

Sample the chutney while mixing and add a little extra salt, ketchup or lemon if needed to reach the balance you prefer.

Variations

Try any of these simple additions to vary the chutney:

• Chopped coriander (cilantro).
• Minced garlic.
• A little grated fresh ginger.
• Finely chopped tomato (seedless and drained).
• A dash of tamarind paste.
• A spoonful of mango chutney for sweetness.
• Use fresh chopped chilli instead of chilli powder.
• Grated lime or lemon zest for aroma.
• Sprinkle toasted mustard seeds or freshly ground black pepper.
• A teaspoon of peanut oil or sunflower oil for a nuttier note.
• Slice the onion into strips or half-rings if you prefer a different texture.

Serving suggestions

With Indian snacks and appetisers: Serve with poppadoms, samosas, onion bhaji, pakoras, kachori, chaat and kebabs.

As a condiment with bread: Pair with naan, roti or chapati and include in kathi rolls.

On sandwiches: Use as a tangy relish in sandwiches or burgers.

With vegetables: Mix into potato salad or serve alongside roasted vegetables.

With main dishes: Complement curries, dals, biryanis, tandoori platters and grilled meats.

What to do with leftover chutney?

• Stir into curries or soups while cooking for extra depth.
• Pan-fry leftovers and use as a sandwich or burger relish.

Storage

Keep chutney in an airtight container in the refrigerator. Best within 1–2 days for peak flavour, and use within 4–5 days. Not suitable for freezing.

Recipe: Indian Onion Chutney for Poppadoms