Pickled Onions with Vinegar and Spice

Steps

1. 1

   Blanch and peel onions

   • Bring a large pot of water to a rolling boil.
   • Cut a shallow X into the root end of each onion (about ¼ inch deep).
   • Working in batches, submerge the onions in boiling water for 2–3 minutes until the outer skin begins to loosen and soften.
   • Remove with a slotted spoon and transfer to a clean kitchen towel or paper towels.
   • Once cool enough to handle, pinch or slip off the papery outer skin and root.
   • The onions will still be firm inside.
   • Rinse under cool water and pat dry.
   • Trim the root end if needed but keep onions whole.

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   Ready when: Onion skins slip off easily when pinched; onion flesh is still firm

   Tip: Don't blanch too long or the onions will start to cook through—2–3 minutes is enough. Blanching makes peeling much easier but keeps them crisp.

2. 2

   Make the pickling brine

   • Pour the malt vinegar and water into a small saucepan.
   • Add the brown sugar, sea salt, cloves, bay leaves, black peppercorns, and mustard seeds (if using).
   • Stir over medium heat until the sugar and salt dissolve completely, about 3–4 minutes.
   • You should see no crystals remaining.
   • Do not boil hard; keep the heat gentle to preserve the vinegar's flavor.
   • Remove from heat and stir in the dried chili (if using) for subtle warmth.
   • Let the brine cool to room temperature before using, about 15 minutes.

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   Ready when: Sugar and salt are fully dissolved and brine is clear; cooled to room temperature

   Tip: Dissolving the sugar and salt in warm liquid ensures they won't crystallize in the jar. Let the brine cool completely—adding hot liquid to raw onions will make them soft.

3. 3

   Pack onions into jars

   • Divide the peeled onions evenly among your sterilized jars, leaving about 1 inch (2.5 cm) of headspace at the top.
   • Pack them in fairly snugly but not so tightly that you can't pour the brine around them.
   • You can layer them if needed.
   • Distribute any spices that settled to the bottom of the pan between the jars so each jar gets cloves, peppercorns, bay leaf pieces, and mustard seeds.

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   Ready when: Onions fill jars with 1 inch headspace; spices are distributed evenly

   Tip: Leave enough headspace so the brine covers all onions by at least ½ inch without overflowing when you pour.

4. 4

   Pour brine and seal

   • Carefully pour the cooled brine over the onions, dividing it evenly and making sure the liquid covers all the onions by at least ½ inch.
   • Tap the jars gently on the counter a few times to release any trapped air bubbles.
   • Top up with a little more brine if needed.
   • Seal the jars tightly with lids or covers.
   • If using traditional jar lids with rubber seals, screw on the metal ring firmly but not so tight that you crack the glass.

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   Ready when: All onions are submerged under brine; jars are sealed tightly

   Tip: Submerged onions stay crisp and don't develop mold. Any onions floating above the brine may soften or spoil.

5. 5

   Rest and cure

   • Store the sealed jars at room temperature in a cool, dark cupboard or pantry.
   • The pickled onions will be edible within 24 hours but improve noticeably after 3–5 days as the flavors meld.
   • By the end of a week, they reach their best balance of sharp vinegar tang and sweet spice.
   • Keep tasting after a few days to see when you prefer them.

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   Ready when: Onions are tender but still crisp with vinegar flavor mellowed slightly; flavors are balanced

   Tip: Unopened jars can sit for weeks before opening. Once opened, they'll keep for weeks in the refrigerator.