What Is Onion relish and How Can I Use It?
Wondering what to do with onion relish? This guide covers how to pick it, cook it, store it, and swap it, plus 2 recipes to put it to work.
Key Points
- A cooked sweet-and-sour condiment: onions simmered with vinegar and sugar into a jammy spread.
- Also sold as onion jam, marmalade, or chutney; you spoon it rather than slice it.
- Melts into burgers, grilled cheese, and cheese boards, cutting through fat like a pickle.
- Cook onions low and slow 30 to 45 minutes first, or scorching turns it bitter.
- Caramelized onions plus a splash of vinegar are the closest homemade substitute.
What is onion relish?
Onion relish is a cooked condiment made by slowly simmering onions with vinegar and sugar until they collapse into a glossy, jammy spread. The long cook drives off the sharp raw bite and leaves a sweet-and-sour tang.
People also call it onion jam, onion marmalade, or onion chutney. The names overlap, but all describe the same idea: onions softened and concentrated into something you spoon, not slice.
How to Use Onion Relish
Think of it as concentrated savory-sweet flavor for rich food. A spoonful melts into a burger or a grilled cheese, where its sweet-tart edge cuts through fat the way a pickle does.
Stir it into pan drippings to build a quick sauce, or fold a dollop through grains and roasted vegetables.
It works well in a loaded plate like Roasted Sweet Potatoes with Hummus & Crispy Kale, and a small spoon brings savory depth to comfort dishes such as Quick 'N Easy Macaroni & Cheese.
The usual mistake is rushing it. Cook the onions low and slow until deeply soft, roughly 30 to 45 minutes, before adding the sugar and vinegar; high heat scorches them and turns the relish bitter instead of sweet.
Substitutes
Caramelized onions get you closest, with a splash of vinegar stirred in at the end to mimic the tang. They lack the syrupy set, but the flavor lands in the same place.
A fig or red-pepper jam covers the sweet-savory role on a cheese board when you have no onion version. For sharper bite without the sweetness, pickled onions bring acid and crunch, though they sit at the opposite end of the texture range.
Buying & Storage
Jarred onion relish lives near the chutneys and condiments; pick one where onions, not corn syrup, lead the ingredient list.
An opened jar keeps in the fridge for about 2 to 3 weeks. Homemade relish, sealed in a clean jar and kept cold, holds a similar window, so make it in small batches.
Always spoon from the jar with a clean utensil. Double-dipping introduces bacteria and crumbs that cut its life short.
Quick facts
- In Chinese
- 洋葱津津乐道
- British (UK) term
- Onion relish
- en français
- oignon goût
- en español
- gusto de cebolla
Recipes using onion relish
There are 2 recipes that contain this ingredient.
Roasted Sweet Potatoes with Hummus & Crispy Kale
Sweet potatoes topped with sweet caramel onions, creamy hummus and crispy kale chips. It's even vegan and vegetarian but beefy enough to satisfy even the meat lovers.
Quick 'N Easy Macaroni & Cheese
A quick and scrumptious dinner that even your kids can help you make!
