Onion Relish – a Homemade Condiment to Elevate your Food Parties

Onion relish is a condiment or sauce made from onions that have been cooked down. It’s not a must but it can be combined with various other ingredients to create a flavourful and versatile accompaniment that pairs well with a multitude of dishes. It will come as no surprise that it is the perfect condiment when organising a barbecue.

onion relish

The onions are usually thinly sliced or chopped and then cooked until they become soft and translucent. Vinegar, often cider vinegar or white vinegar, is added to provide acidity and enhance the flavour. We choose to use red wine vinegar in this recipe since we use red onions. Sugar is added to balance the tanginess of the vinegar and bring a touch of sweetness to the relish. In this recipe we didn’t add extra spices but common spices and seasonings used may include black pepper, mustard seeds, chili flakes, garlic, and herbs like thyme or bay leaves.

How to best serve onion relish

Onion relish can be served as a topping or accompaniment for various dishes. It pairs perfectly with burgers, hot dogs, sandwiches, grilled meats, sausages, cheese, or elevates a salad to the next level! It adds a burst of flavour and texture, complementing the savoury elements of the dish.

Cutting the onions might bring tears to your eyes, but this recipe is straightforward and quick to prepare. 

Also read about other condiments and spices.

onion relish

Onion Relish

It will come as no surprise that onion relish is the perfect condiment when organising a barbecue.
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Prep Time 30 minutes
Cook Time 20 minutes
Total Time 50 minutes
Course Condiments
Cuisine International
Servings 8 people
Calories 45 kcal

EQUIPMENT (click pictures for details)



  • Sweat the sliced onions in the butter over a low heat, add the salt and cook until tender.
    Add the sugar, 250 ml water, red wine and the vinegar. Increase the heat and cook until the liquid evaporates.
    sweating onions for onion relish
  • Taste the red onion doneness and add the rest of the water if necessary.
    cooking onion relish
  • When the onion relish is cooked it will be sticky like jam.
    onion relish almost done
  • Season to taste and transfer into sterilised jars, close the lid, and allow to cool.
    onion relish

Nutrition for 1 portion

Calories: 45kcalCarbohydrates: 3gProtein: 0.05gFat: 3gCholesterol: 8mgSodium: 295mgFiber: 0.01gSugar: 3gVitamin A: 94IUVitamin C: 0.1mgCalcium: 6mgIron: 0.1mg
Keyword barbecue, onion, spread
Tried this recipe?Let us know how it was! #culinaryambition

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