Quick Pickled Red Onions
Thinly sliced red onions submerged in a boiling mixture of vinegar, salt, and sugar turn bright neon pink and crisp after only thirty minutes. This method tames the raw onion bite, leaving them sharp, acidic, and ready to cut through heavy or fatty dishes.
The logic of the slice
The thickness of your onion slices dictates the crunch. Aim for paper-thin, translucent rounds; if they are too thick, they stay raw and pungent at the center.
- Mandoline or sharp chef's knife
- Small saucepan
- Glass jar with a tight lid
What goes in.
- 1 largered onion, sliced into thin rings
- 1/2 cupapple cider vinegar
- 1/2 cupwater
- 1 tbspgranulated sugar
- 1.5 tspkosher salt
Pouring hot, not boiling
Bringing your vinegar mixture to a simmer ensures the salt and sugar dissolve completely, while the residual heat softens the onions just enough to lose their raw edge without turning them to mush.
The method.
Prep the onions
Pack the raw, sliced onions tightly into your glass jar. If they don't fit, give them a gentle press; they will shrink significantly once the liquid hits them.
Create the brine
Combine water, vinegar, salt, and sugar in a small saucepan over medium heat. Stir until the crystals disappear and the liquid begins to steam.
Submerge
Pour the hot liquid over the onions in the jar until they are fully covered. Tap the jar against the counter to release any trapped air bubbles.
Cool and set
Let the jar sit uncovered at room temperature until it is cool to the touch. Screw the lid on and refrigerate for at least 30 minutes before serving.
Other turns to take.
Spiced
Add a teaspoon of black peppercorns or a smashed clove of garlic to the jar before pouring in the brine.
Herbed
Tuck a sprig of fresh oregano or a bay leaf into the jar for a deeper, earthier aroma.
When it doesn't go to plan.
If you lack apple cider vinegar, white distilled vinegar works fine but creates a sharper, more aggressive pickle.
The onions will change from deep purple to a vivid magenta as the acidity reacts with the natural pigments in the onion.
These keep in the refrigerator for up to two weeks, but the texture is best within the first five days.
The ones that keep coming up.
Why did my onions turn blue or green?
This is a natural chemical reaction between the sulfur in the onions and trace minerals in your water or the acid. They are safe to eat.
Can I use other types of onions?
White or yellow onions work but lack the vibrant color of red onions. Their flavor is also stronger and less floral.
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