Quick-Pickled Red Onions
To pickle red onions, submerge thinly sliced onions in a hot brine of equal parts vinegar and water, seasoned with salt and sugar. Let them sit until the harsh bite of the raw onion mellows into a bright, crisp pink sliver.
The balance of acidity is what matters most.
These are not canned for long-term storage; keep them in the refrigerator and eat them within two weeks.
- Mandoline or sharp chef's knife
- Glass jar with a tight-fitting lid
- Small saucepan
What goes in.
- 1 largered onion
- 1/2 cupwhite distilled or apple cider vinegar
- 1/2 cupwater
- 1 tbspsugar
- 1.5 tspkosher salt
Slicing for texture
Slice the onions paper-thin. When you pour the hot brine over them, the heat softens the cell walls just enough to remove the pungent sulfur edge while keeping the crunch intact.
The method.
Prepare the onions
Peel the onion, trim the ends, and use a mandoline to slice it into uniform, translucent rings.
Heat the brine
Combine vinegar, water, sugar, and salt in the saucepan over medium-high heat. Stir until the sugar and salt have fully dissolved and the liquid is steaming, but not at a rolling boil.
Pack the jar
Stuff the raw onion slices into the glass jar. Press them down firmly so they are tightly packed.
Submerge
Pour the hot liquid over the onions until they are completely covered. Gently tap the jar on the counter to release any trapped air bubbles.
Cool and store
Let the jar sit at room temperature for 20 minutes, then seal the lid and move to the refrigerator. They will turn a bright, translucent magenta as they sit.
Other turns to take.
Spiced
Add a teaspoon of black peppercorns, a smashed garlic clove, or a pinch of red pepper flakes to the jar before pouring in the brine.
Herbed
Tuck a sprig of fresh oregano or a bay leaf into the jar for a subtle earthy undertone.
When it doesn't go to plan.
Use white vinegar for the cleanest, brightest color.
If you lack a mandoline, focus on knife consistency; thick slices will remain too spicy.
The onions are best after two hours in the fridge, but they reach their prime after 24 hours.
The ones that keep coming up.
Why did my onions turn neon pink?
The acid in the vinegar reacts with the anthocyanins in the red onions. It is a natural chemical reaction and means the pickling is working correctly.
Can I reuse the brine?
Once the onions are gone, discard the brine. It loses its potency and freshness after the first batch.
How real cooks make it.
No one’s shared their version yet. Be the first to put your kitchen on the map.
Cook this your way?
Share your version — your steps, your story. We’ll feature it right here.
Add your recipe