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Easy Three-Ingredient Pickled Red Onions Recipe

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4.2 from 61 reviews

This Easy Pickled Red Onions recipe requires just three simple ingredients and is a quick, versatile way to add vibrant, tangy crunch to salads, sandwiches, tacos, and more. With thinly sliced red onions soaked in a mildly sweet vinegar brine, these pickled onions are ready in under an hour and can be stored for weeks, making them a perfect condiment to elevate your meals.

  • Total Time: 15 minutes
  • Yield: About 1 cup

Ingredients

Pickling Brine

  • 150 ml white wine vinegar
  • 100 ml water
  • 1 tablespoon white sugar

Main Ingredient

  • 1 red onion, very finely sliced

Instructions

  1. Prepare the Onion: Peel the red onion and slice it very thinly using a sharp knife or a mandoline for even slices. The thinner the slices, the quicker they absorb the pickling brine.
  2. Make the Pickling Brine: In a small saucepan, combine the white wine vinegar, water, and white sugar. Heat gently over medium heat just until the sugar dissolves completely. Do not boil.
  3. Combine and Pickle: Place the sliced onions in a clean jar or heatproof container. Pour the warm vinegar mixture over the onions, ensuring they are fully submerged. Let the jar cool to room temperature.
  4. Refrigerate and Marinate: Seal the jar with a lid and refrigerate for at least 30 minutes before serving. For best flavor, leave to marinate for 1-2 hours or overnight. The pickled onions will keep well for up to 2 weeks in the fridge.

Notes

  • Use a mandoline to slice onions uniformly thin for best texture.
  • Adjust sugar quantity to your preferred sweetness.
  • Red wine vinegar or apple cider vinegar can be used as alternatives.
  • For less tangy pickles, reduce vinegar slightly and increase water.
  • Store pickled onions in a glass jar for best flavor retention.
  • Author: Madelynn
  • Prep Time: 10 minutes
  • Cook Time: 5 minutes
  • Category: Condiment
  • Method: No-Cook
  • Cuisine: American
  • Diet: Vegetarian