Tangy Indian Onion Chutney Recipe for Poppadoms

An epicurean adventure to: India

Remember that tangy Indian onion chutney you enjoy with poppadoms at British Indian restaurants? You can recreate that sharp, restaurant-style relish at home in minutes. This cold red onion chutney combines raw diced onions with a zesty ketchup-based dressing for a bright pinkish-red sauce with a spicy, tangy bite.

Also called red onion chutney, raw onion chutney, spiced onions, or Indian onion relish, this simple condiment is versatile and easy to make—no cooking required, just a few minutes of prep and some time in the fridge to let the flavours meld.

This onion chutney is often served alongside poppadoms and other Indian appetisers. It sits happily with sweet mango chutney and cooling mint sauce or raita to create a trio of sauces that typically accompany Indian meals in the UK and elsewhere.

With fewer than 10 minutes of active work, you can make enough chutney to serve as a condiment for snacks, breads, curries and sandwiches. It is best served cold, so making it ahead and chilling it before serving is ideal.

Fast facts: India

What’s to love about this recipe

• Flavourful: A balanced mix of tang, heat and savoury notes.
• Versatile: Works as a side for snacks, mains and sandwiches.
• Easy: Quick to prepare with no cooking required.
• Texture: Diced onions provide a satisfying crunch.
• Dietary friendly: Naturally vegan, vegetarian and gluten-free—check your ketchup for specific dietary needs.
• Customisable: Adjust spice and acidity to taste.
• Restaurant-style: Recreate the familiar chutney from curry houses at home.

Key ingredient notes and substitutions

See the recipe card below for the full list of ingredients.

Red onion

Red onion gives the chutney its colour and a mild sweetness. White or brown onions can be used if you prefer. The recipe uses 250g of chopped onion, roughly one large or two medium red onions, to keep the balance of sauce to onion correct.

To mellow the bite, soak the chopped onions in ice or very cold water for 15–30 minutes, then dry thoroughly before combining with the dressing.

Tomato ketchup

Use your preferred ketchup. For lower sugar, choose a reduced-sugar variety. You can also mix ketchup with tomato paste for a thicker, more concentrated flavour.

Cumin seeds

Toast cumin seeds in a dry pan until fragrant; this step adds depth and a warm, nutty aroma. It takes about a minute—watch closely so they don’t burn.

Chilli powder and lemon

Adjust the chilli to your heat tolerance; the onions add their own sharpness, so start moderate. A small splash of lemon or lime juice brightens the chutney but is optional.

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

1. Dice 250g red onion into small, even pieces and separate any clumps so the texture stays consistent.

2. Optional: soak the diced onions in ice water for 15–30 minutes to reduce sharpness, then drain and pat dry.

3. Toast 1 teaspoon cumin seeds in a dry small pan over medium-high heat until fragrant.

4. In a small bowl combine 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 lemon juice if using. Stir to a smooth paste.

5. Drain and dry the onions thoroughly on kitchen paper or a clean towel.

6. Place the dried onions in a medium bowl, add the prepared sauce, and gently toss until all pieces are evenly coated.

7. Transfer the chutney to a serving bowl and chill for at least one hour to allow the flavours to meld. Serve cold.

Top Tips

Mellow the Onions

Soaking diced onions in ice water for 15–30 minutes reduces pungency. Always dry them well before adding the dressing.

Separate the pieces

After dicing, break up any clumps so each bite has small, individual onion pieces rather than large chunks.

Balance the spice

Start with a modest amount of chilli powder and adjust to taste—remember the raw onions add a natural bite.

Taste as you go

Sample the chutney while mixing and adjust salt, ketchup or lemon to reach the flavour profile you like.

Variations

Try adding small amounts of these to vary the chutney:

• Chopped fresh coriander
• Minced garlic
• Fresh ginger, finely grated
• Finely chopped tomato (seedless, drained)
• A touch of tamarind paste
• A dollop of mango chutney for sweetness
• Fresh chopped chilli instead of chilli powder
• Lemon or lime zest
• Mustard seeds or freshly ground black pepper
• A teaspoon of oil (peanut or sunflower) for a nutty note
• Slice the onion into strips or half-rings if you prefer that texture

Serving suggestions

With Indian snacks and appetisers: Poppadoms, samosas, onion bhaji, pakoras, kachori, chaat and kebabs.

With breads: Naan, roti, chapati or inside kathi rolls.

On sandwiches: Use as a zesty relish for sandwiches and burgers.

With vegetables: Stir into a potato salad or serve alongside roasted vegetables.

With mains: Serve alongside curries, biryanis, tandoori platters or grilled meats.

What to do with leftover chutney?

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

Storage

Keep the chutney in an airtight container in the fridge. Use within 4–5 days for best texture and flavour; it is freshest in the first two days.

Not suitable for freezing.

To follow your poppadoms and sauces…

Try this chutney with hearty mains such as Chicken Handi, Nepalese chicken curry, oven-baked chicken Pasanda, quick chicken Karahi, or aromatic beef curry with coconut milk.