How to pickle onions - Two Thirsty Gardeners (2024)

Rich rarely passes up an opportunity to mention his gherkins. “Look at how magnificent they have grown” he squeaks all summer long. “Behold my giant jar of crisp, pickled gherkins” he boasts whenever I pop round his house for another tedious team meeting.

While it’s true that his gherkins are firm, knobbly and sour enough to make a chef blush, I much prefer to grow and pickle onions, believing that no vegetable tastes as good after a prolonged bath in vinegar than the princely edible allium.

Cracking open a jar of my pickled onions has become a Christmas day tradition, as ritualistic as the pulling of crackers, the flambéing of Christmas pudding and the opening of a bottle of strong, dark beer as soon as breakfast has settled.

So now, with another November pickling safely negotiated, I feel the time is right to share my methods, giving you all the chance of getting one up on Rich and his jar of knobbly gherkins.

A step-by-step guide to pickling onions

1 First, choose your onions
You can use any type of onion (slice them if they’re big) but shallots are the best. Aside from being the ideal size, their gentle sweet flavour works wonderfully when pickling. There are even some varieties that have been specially marked out for their pickling excellence which are available to sow or buy if you look hard enough – take a look at this guide on how to plant onions if you do decide to sow your own. The key attribute for prime onion pickleability is a bullet-like firmness, again something you get from a fresh shallot.

2 Next, peel your onions
You could reach straight for the knife to whip off the brown skins but, for a more precise and easy peel, first soak them for five minutes in a bowl of boiling water and rinse until cool enough to handle. Trim the bare minimum from the tops and bottoms (excess trimming could cause more layers to slip off) and the skins should peel away with ease.

3 Salt your onions
Now roll your bald onions in salt and leave in a bowl overnight, rinsing the salt away in the morning before patting dry. Although this stage is optional, the salt-and-rinse method will extract moisture from within the onion and you will be rewarded with a crisper, crunchier, firmer pickle in the long run. Worth the extra effort.

4 Prepare your pickling vinegar
You could use cider vinegar.
You could use wine vinegar.
You could use clear distilled vinegar for clarity of onion.
Or you could use a combination of all three.
But for the best results use good ol’ dirty brown malt vinegar. You’ll need roughly an equal volume of water to weight of onions – ie 100ml vinegar for every 100g of onions. And you also need 40g white sugar per 100g onions.

Pour the vinegar into a pan and add your sugar and the allaimportant pickling spices. I go for the following:

1 teaspoon mustard seed

1 teaspoon of black pepper

1 bay leaf.

I also produce an extra jar with a teaspoon of dried chilli added, should anyone dare complain that my standard pickle isn’t spicy enough.

Gently heat the vinegar and spices for five to ten minutes (don’t let it boil), stirring to dissolve the sugar, then set aside to cool.

5 Pack your pickles
Now is the time to pack your onions into jars. You’ve sterilised your jars first, yes? If not, wash in hot water and dry in an oven on a low heat. Or chuck them in the dishwasher. Make sure you allow them to cool before the cooled vinegar goes anywhere near the glass.

Place the onions into the jar leaving as little space between them as possible (think like a dry-stone-waller and build layers of onions according to size and shape). Fill with the pickling vinegar, including the spices (although I always remove the bay leaf), until the onions are covered. Seal the jar and store somewhere cool and dark, six weeks being an optimum minimum length of time (but don’t worry if you need to eat them sooner).

Pickle perfection is as easy as that. Enjoy.

How to pickle onions - Two Thirsty Gardeners (1)

To take a gander at Rich’s gherkins and learn how he pickles them, head on over to this page

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How to pickle onions - Two Thirsty Gardeners (2024)

FAQs

How to pickle onions - Two Thirsty Gardeners? ›

Fill with the pickling vinegar, including the spices (although I always remove the bay leaf), until the onions are covered. Seal the jar and store somewhere cool and dark, six weeks being an optimum minimum length of time (but don't worry if you need to eat them sooner). Pickle perfection is as easy as that. Enjoy.

Do you soak onions in salt water before pickling? ›

I always like to salt and soak the onions before pickling. This gets rid of the harsh 'bite' that often makes raw-onions unappetizing. Soaking them for a short time in hot water softens the onions slightly, priming them for quicker, more thorough absorption of the vinegar brine.

Why do you boil onions before pickling? ›

Hot water is often pour over onions (that aren't going to be pickled or cooked) in order to tame their sharpness and soften them a little.

How long should you leave pickled onions before eating? ›

Allow the jars to cool to room temperature before covering them and transferring them to the fridge. Your onions will be ready to eat when they are bright pink and tender. This could take anywhere from 1 hour to overnight, depending on the thickness of your onions. They will keep in the fridge for up to 2 weeks.

When should you pickle onions for Christmas? ›

Well, in the UK you start to see small "pickling onions" in the greengrocers and supermarkets from October onwards, and with a view to the Christmas buffet table, and that ubiquitous cheese board, now is the time to make these pickled onions so they have time to "mature" for 6 weeks.

Is it better to soak onions in water or vinegar? ›

Just peel and slice the red onion as called for in your recipe, then submerge them in a bowl of cold or ice water. Let them sit for at least ten minutes, stirring once or twice, before draining and using them in your recipe. For added flavor, you can also soak the onions in lime juice, lemon juice, or vinegar.

Why boil vinegar before pickling? ›

You take all of your ingredients, apart from the product that is being pickled, and bring them to a boil. The heating process helps activate the flavors in the brine and marry them together. This hot brine is then poured over what is to be pickled and then stored in the refrigerator.

Can you pickle onions without blanching? ›

If you are making pickles that will be refrigerated and eaten soon after they are made, then you Might be OK skipping the blanching process. But if are making food you want to last safely, then it's a step you don't want to miss.

Why are my pickled onions mushy? ›

If you're making a fresh batch of pickled red onions, let them cool completely at room temperature before stashing them in the fridge. Pickled red onions typically last for up to a week. You can tell it's time to toss them if the color darkens significantly, the brine becomes cloudy or fizzy, or the pickles go soft.

Why are the bacteria killed off in a jar of pickled onions? ›

Salt is added at the beginning of the process to interfere with the growth of microorganisms other than the lactic acid bacteria. A small amount of vinegar may be called for to create an acid environment that discourages growth of unwanted microorganisms.

Is it OK to eat pickled onions everyday? ›

Pickled onions, for example, can be a beneficial part of a healthy diet. The pickling process does use a large amount of salt and sugar, but when eaten in moderation and considering the fact that pickled vegetables retain their nutritional values, they can be included in your diet.

Do homemade pickled onions go bad? ›

Whether you've got way too many onions or just really enjoy the pickled variety, you might be wondering how long they will stay good for. After all, food safety is paramount when it comes to home-canned goods. When done properly, your unopened home-canned pickled onions are shelf-stable for one year.

What vinegar for pickling? ›

Most pickle recipes call for distilled white vinegar. This is the clear, colorless vinegar made by fermenting grains. It has a mellow aroma, tart acid flavor and does not affect the color of light-colored vegetables or fruits.

Is it necessary to salt onions before pickling? ›

Salt is a very important component when pickling, as it helps prevent the production of harmful bacteria by drawing out moisture. There are two types of 'salting'. Dry salting prior to the pickling process (which the recipe below uses) or wet salting, which uses a brine as part of the pickling process.

Can you reuse pickle juice to pickle onions? ›

Pickling doesn't have to be a long process involving canning and special supplies. If you have vegetables that would be good pickled, like onions, garlic, carrots or green beans, toss them in the jar of leftover pickle juice, and see what happens. They'll make a nice addition to a charcuterie platter or Blood Mary.

Why do you blanch onions before pickling? ›

Blanch red onions.

This step will help cut the raw onion flavor for those who prefer a milder tasting pickle. If you don't mind the raw flavor of onions, feel free to skip this step. Once the water is at a boil, submerge onions for about 10-15 seconds.

What does soaking onions in salt water do? ›

Wait 10 minutes, then serve. The salt softens the onion's fibrous texture and mellows the sharpness of their flavor. There are other ways to tame raw onion, of course. You could soak slices in lemon juice for 20 minutes, which lends a slightly pickled flavor, as in this Tomato and Herb Salad with Sumac.

Should you salt vegetables before pickling? ›

The first step in making pickled vegetables is to allow the clean, cut vegetables to soak in salt or a strong saltwater solution for at least 3 hours, or sometimes overnight. As the vegetables swim in salt, some moisture is drawn from the tissues, which helps to preserve crisp texture through the pickling process.

What does salt do to pickled onions? ›

Now roll your bald onions in salt and leave in a bowl overnight, rinsing the salt away in the morning before patting dry. Although this stage is optional, the salt-and-rinse method will extract moisture from within the onion and you will be rewarded with a crisper, crunchier, firmer pickle in the long run.

What does soaking pickles in salt water do? ›

This salt treatment draws water out of the cucumbers and flavors them, so it's critically important. After layering or mixing in plenty of sea salt, I cover the salted cukes with ice cubes and a tea towel and forget about them for a few hours.

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