Quick Pickled Red Onions with Sumac
Bright, tangy pickled red onions infused with tart sumac—a Middle Eastern staple that's ready to eat in 30 minutes. These onions add a sharp, fruity brightness to shawarma, gyros, grain bowls, and salads. The pickling liquid is balanced to be both vinegary and slightly sweet, with sumac providing a distinctive lemony note without the moisture of fresh lemon.
- Prep
- 10 min
- Cook
- 5 min
- Wait
- 30 min
- Total
- 45 min
- Makes
- 2 cups (about 12 oz) pickled onions
Steps
Before you start
- Have a clean glass jar or container ready
- Measure sumac before starting so you don't lose it to steam
- Use fresh, firm red onions for the best texture
Slice and prepare onion
- Peel the red onion and trim the root and stem ends.
- Slice it thinly (about ¼ inch / 6 mm thick) with the grain running vertically, which helps the onion hold its shape.
- Place the sliced onion in your glass jar or container.
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Ready when: Onion slices are uniform and loosely packed in the jar
Tip: Slice with the grain so the onion pieces stay intact during pickling rather than falling apart.
Combine pickling liquid
- In a small saucepan (1.5-quart / 1.4-liter), combine the red wine vinegar, water, sugar, salt, sumac, and peppercorns (if using).
- Stir to dissolve the sugar and salt.
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Ready when: Sugar and salt are fully dissolved and the mixture is uniform
Tip: Stir well—the sumac will want to clump, so break it apart as you mix.
Bring to a boil and cool slightly
- Place the saucepan over medium-high heat and bring to a rolling boil.
- Let it boil for 1 minute, then remove from heat and let it cool for 2–3 minutes so it's hot but not scalding when it hits the onions.
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Ready when: Liquid is at a rolling boil, then removed from heat
Tip: Cooling the liquid slightly prevents the onions from becoming too soft or mushy.
Pour and infuse
- Carefully pour the hot pickling liquid over the sliced onions in the jar, ensuring the onions are fully submerged.
- If needed, press them down gently with the back of a spoon so they stay covered by the liquid.
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Ready when: Onions are fully submerged in the hot liquid
Tip: Keep the onions under the liquid so they pickle evenly and don't develop off-flavors from exposure to air.
Let sit and cool
- Let the jar sit uncovered at room temperature for at least 30 minutes, allowing the onions to soften slightly and absorb the pickling flavors.
- The onions will continue to develop flavor as they cool.
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Ready when: Onions have turned a deeper shade of red and are tender to bite
Tip: These are ready to eat after 30 minutes, but they're even better after an hour or two for deeper flavor.
Serve or store
- Transfer to a clean jar or airtight container.
- Taste and adjust seasoning if needed (add a pinch more salt or sumac if desired).
- Use immediately or refrigerate.
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Ready when: Onions are seasoned to your taste
Tip: They keep well and continue to develop flavor over 2–3 days, making them even more delicious as time goes on.
Good to know
Tips
- These onions are intensely sharp at first; they mellow and develop rounded flavor after sitting overnight, making them ideal for make-ahead.
- Sumac is the star of this recipe—don't skip it or substitute lightly. Look for it in Middle Eastern markets, specialty grocery stores, or online. It should be deep burgundy and have a tart, lemony aroma.
- Serve these with shawarma, gyros, falafel, grilled chicken, or in salads and grain bowls. They also pair beautifully with hummus or baba ghanoush as a side.
- For a spicier version, add a pinch of Aleppo pepper or crushed red pepper flakes to the pickling liquid.
Make ahead
Make these up to 5 days ahead. They actually taste better after sitting overnight, as the flavor deepens and the onions become even more tender.
Storage & reheating
Room temperature: up to 1 day (loosely covered). Refrigerator: up to 5 days in an airtight container. Freezer: not recommended—the texture becomes mushy. Reheat: not necessary; serve cold or at room temperature directly from the fridge.
Substitutions
- red wine vinegar → white wine vinegar or apple cider vinegar. White wine vinegar will be slightly less fruity; apple cider vinegar adds a subtle sweetness. Use the same amount.
- sumac powder → fresh lemon zest plus ½ teaspoon dried oregano. Sumac's tartness is distinctive, but lemon zest approximates it. You'll lose sumac's fruity note and gain lemon's brightness. Skip if you want to stay authentic.
- granulated sugar → honey or agave nectar. Use 1.5 tablespoons (20 ml) honey or agave. The result will be slightly richer and less clean-tasting.
- kosher salt → sea salt. Use the same weight (4 g). Flavor is nearly identical; coarser crystals may take 1 minute longer to dissolve.
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- Meal
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- Method
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- Quick & Easy
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