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Pickled Onion

Onion preserved in vinegar or citrus brine.

Pickled Onion — illustrative ingredient image

About Pickled Onion

Pickled onion is onion preserved in vinegar or a citrus brine. It is commonly used as a condiment, garnish, salad component, sandwich filling, or accompaniment to savoury foods where acidity and onion flavour provide contrast.

Its flavour is sharp, tangy, and distinctly oniony, with sweetness depending on the brine. Raw onion is crisp and pungent, while pickling generally softens its bite and may leave the slices crisp-tender.

It is usually sold or prepared as rings, slices, wedges, or chopped pieces in a jar or other container with pickling liquid. Vinegar or citrus, added sugar and salt, contact time, and draining change its colour, firmness, pungency, and acidity.

Ingredient type
compound ingredient

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Where pickled onion appears

3 linked foods

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Main dishes

Soups

Street food

Ingredient connections awaiting review · Coverage is still growing, including packaged snacks.

Name examples awaiting language review. Confirm the specific food or product.

Local names for pickled onion

Names and romanised forms to recognise on menus and labels.

English

Pickled onion

Available names only. Languages may be spoken in other countries; a name alone does not identify every ingredient in a dish.

Pickled Onion nutrition & diet

Pickled Onion nutritional value

Reference: Onions, pickled, drained

Per 100 g of the edible portion of the stated reference food.

Calories
24kcal
Protein
0.9g
Carbs
4.9g
Fat
0.2g

Reference example for the named food and preparation, per 100 g edible portion. This is not a universal value for every recipe or brand; packaged products should be compared with their own label. CoFID 2021 food code 13-309. Carbohydrate follows the dataset’s available-carbohydrate convention. Contains public sector information licensed under the Open Government Licence v3.0: https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.

Portions & preparation

Use the edible onion pieces and identify whether citrus or vinegar brine remains attached. Sliced thickness, raw or blanched preparation, added sugar, salt, oil, and herbs can alter the appropriate comparison, so drained and undrained forms should be distinguished.

Compare the right form: Match references to pickled onion pieces in citrus or vinegar brine, specifying sliced form, drained status, sweetening, oil, and preparation method.

Diet considerations

Onion is plant-derived, but the brine and accompanying recipe determine compatibility. Check for honey, animal-derived additions, oil, sauces, or cereal ingredients in prepared condiments. Sweetened versions can differ in carbohydrate pattern from unsweetened onions, and portion size matters when used as a garnish versus a side.

AI-authored reading notes · Awaiting editorial review. Measured values, where available, have a separate source above.

Dietary compatibility

  • Vegan
    Not established
  • Vegetarian
    Not established
  • Pescatarian
    Not established
  • Keto
    Not established
  • Paleo
    Not established
  • Low-carb
    Not established
  • Halal
    Not established
  • Kosher
    Not established
What these diet assessments mean
Vegan · Not established
The available profile does not establish the full composition or processing for this dietary pattern.
Vegetarian · Not established
The available profile does not establish the full composition or processing for this dietary pattern.
Pescatarian · Not established
The available profile does not establish the full composition or processing for this dietary pattern.
Keto · Not established
A defined serving and sourced carbohydrate data are needed before assessing this dietary pattern.
Paleo · Not established
The ingredient form and processing have not been assessed against this dietary pattern.
Low-carb · Not established
A defined serving and sourced carbohydrate data are needed before assessing this dietary pattern.
Halal · Not established
Sourcing, processing and any applicable certification have not been verified. A food name alone does not establish halal status.
Kosher · Not established
Sourcing, processing and any applicable certification have not been verified. A food name alone does not establish kosher status.

For the plain ingredient · Awaiting review. Diet compatibility is not allergy suitability or halal/kosher certification. Keto and low-carb depend on the portion.

Reviewed ingredient entryIngredient reference · Preparations vary

AI-generated illustration for visual context. It does not identify a particular product or establish allergen content.

Sources & review

Nutrition reference: UK Composition of Foods Integrated Dataset (CoFID), 2021 — Onions, pickled, drained ↗. Values are scaled from 100 g of the recorded edible form. Individual portions have no assumed fixed weight.

Expanded overview, name examples and nutrition notes are database drafts awaiting editorial review. Numeric nutrition values, where shown, have their own source and food-form reference.

The ingredient description and dish connections come from the draft catalogue and may change after review.

Last recorded verification: .