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Home » Cuisines » Indian

Curry House Spicy Onions

Published: Mar 24, 2026 by Deborah · This post may contain affiliate links · This blog generates income via ads · #sponsoredpost · Leave a Comment

Spicy onions in a black serving bowl sitting on a black dinner plate with poppadoms and a dish of mango chutney.
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If you've ever ordered poppadoms at a curry house, you'll know the star of the show is often the spicy onions. It's how I judge a good Indian restaurant or takeaway...if I love their spicy onions, I'll definitely go back!

This simple, punchy onion salad is tangy, slightly sweet and packed with spice - and the good news is you can make it at home in just minutes using everyday ingredients. 

Enjoy as a starter with poppadoms and mango chutney, onion bhajis, samosas and pakoras, or as a side dish with your favourite Indian curries.  It's best eaten fresh, but will keep for a maximum of 2 days in fridge.

The original recipe is from The Curry Guy website.

Tips

  • Optional variations:
    • Minty spicy onions - add a tsp of dried mint or a tbsp of chopped fresh mint leaves for a minty version.
    • Extra hot spicy onions - try different heat levels with hot chilli powder, chilli flakes or chopped fresh red chillis.
  • This curry house spicy onions recipe is easily adapted if you're cooking for less or more people.

Frequently Asked Questions

What is curry house spicy onions made of? 

They're typically made from chopped onions mixed with spices, ketchup or tomato base, and lemon juice. 

How do you make spicy onions like a takeaway? 

Use chopped onions and mix with a tangy, slightly sweet, spiced sauce. Let them sit before serving. 

Can I make spicy onions ahead of time? 

Yes - they taste better after 45 to 60 minutes as the flavours develop. 

How do you stop onions being too strong? 

Soak chopped onions in iced cold water for an hour, then drain well before mixing. 

Are spicy onions the same as onion chutney? 

They're similar, but spicy onions are fresher and less sweet than traditional chutneys. 

Can you make spicy onions without ketchup? 

Yes - use tomato purée, spices and a little sugar instead. 

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How to make these Curry House Spicy Onions

Ingredients

  • 1 large onion (approx. 180g), chopped
  • 1 tsp cumin seeds, toasted
  • 3 tbsp tomato ketchup (I use Heinz)
  • 1 tbsp tomato purée
  • 1 tsp chilli powder (I use 0.5 tsp mild and 0.5 tsp hot)
  • a pinch of salt
  • 0.5 tsp lemon juice
  • 0.5 tsp rapeseed or sunflower oil

Instructions

  1. Place the sliced onions in a medium mixing bowl with some ice cubes and cold water and put it in the fridge for an hour.
  2. Meanwhile, toast the cumin seeds - heat a small frying pan over a high heat for 2 to 3 minutes.  Add the cumin seeds in a single layer and toast for 1 minute, tossing constantly. Transfer the toasted cumin seeds to a plate so that they cool and stop cooking.
  3. When the hour is up, drain the onions in a colander, remove any ice cubes and pat the onions dry with some kitchen roll.  
  4. Return the onions to the mixing bowl and mix in the toasted cumin seeds, ketchup, tomato purée, chilli powders, salt, lemon juice and oil with the cold onions.
  5. Transfer the onions to a serving bowl and place them in the fridge for at least 45 minutes before serving.
  6. Enjoy with poppadoms and mango chutney as a starter or as a side with a feast of your favourite Indian dishes.

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Spicy onions in a black serving bowl sitting on a black dinner plate with poppadoms and a dish of mango chutney.

Curry House Spicy Onions

By: Deborah
Make authentic curry house spicy onions at home. This easy Indian takeaway-style recipe is packed with flavour and perfect as a dip or side. 
PREP: 10 minutes mins
Chilling and resting time: 1 hour hr 45 minutes mins
COOK: 1 minute min
TOTAL: 1 hour hr 56 minutes mins
Servings: 4 people
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Equipment

  • Small frying pan

Ingredients

  • 1 large onion approx. 180g, chopped
  • 1 tsp cumin seeds toasted
  • 3 tbsp tomato ketchup (I use Heinz)
  • 1 tbsp tomato purée
  • 1 tsp chilli powder (I use 0.5 tsp mild and 0.5 tsp hot)
  • a pinch of salt
  • 0.5 tsp lemon juice
  • 0.5 tsp rapeseed or sunflower oil

Instructions

  • Place the sliced onions in a medium mixing bowl with some ice cubes and cold water and put it in the fridge for an hour.
  • Meanwhile, toast the cumin seeds - heat a small frying pan over a high heat for 2 to 3 minutes. Add the cumin seeds in a single layer and toast for 1 minute, tossing constantly. Transfer the toasted cumin seeds to a plate so that they cool and stop cooking.
  • When the hour is up, drain the onions in a colander, remove any ice cubes and pat the onions dry with some kitchen roll.
  • Return the onions to the mixing bowl and mix in the toasted cumin seeds, ketchup, tomato purée, chilli powders, salt, lemon juice and oil with the cold onions.
  • Transfer the onions to a serving bowl and place them in the fridge for at least 45 minutes before serving.
  • Enjoy with poppadoms and mango chutney as a starter or as a side with a feast of your favourite Indian dishes.

Notes

  • Optional variations:
    • Minty spicy onions - add a tsp of dried mint or a tbsp of chopped fresh mint leaves for a minty version.
    • Extra hot spicy onions - try different heat levels with hot chilli powder, chilli flakes or chopped fresh red chillis.
  • This curry house spicy onions recipe is easily adapted if you're cooking for less or more people.
 
You might also like to try: 
  • condiments and sauces
  • Indian recipes
 

Nutrition

Calories: 36kcal | Carbohydrates: 7g | Protein: 1g | Fat: 1g | Saturated Fat: 0.1g | Polyunsaturated Fat: 0.4g | Monounsaturated Fat: 0.2g | Sodium: 123mg | Potassium: 123mg | Fiber: 1g | Sugar: 4g | Vitamin A: 234IU | Vitamin C: 4mg | Calcium: 17mg | Iron: 1mg

Nutrition information is automatically calculated, so should only be used as an approximation.

KEYWORDS curry house spicy onions, easy spicy onions UK, Indian restaurant onion salad, Indian spicy onions, onion salad curry house, poppadom onion chutney, spicy onion dip, spicy onions recipe, takeaway style onion salad
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Deborah sitting at the breakfast bar in their kitchen with a green Head Chef mug.

Hello!   I'm Deborah and I'm married to David and have 2 lovely step sons and the most beautiful fox red labrador retriever called Ritchie, who we took home at the end of May 2020 as an 8 week old puppy.   David and I both love cooking…for ourselves, family and friends.   I’m definitely one of the lucky ones…getting cooked for and we enjoy cooking together.

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