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Making pickled walnuts is a traditional British preserving method that transforms unripe green walnuts into a tangy, spiced condiment.
If you’ve ever wondered how to make pickled walnuts, the process is surprisingly straightforward, though it does require patience and perfect timing.
These pickled walnuts are a beloved accompaniment to cheese boards, cold meats, and hearty salads across the UK.
The key is harvesting the walnuts before their shells harden completely, usually in late June or early July.
In this post, we’ll walk through how to make pickled walnuts step by step, from foraging to jarring.
Let’s dive into this classic recipe so you can make pickled walnuts at home.
Why Make Pickled Walnuts?
Pickled walnuts have been a staple in British pantries for centuries, and there are plenty of reasons to make them yourself.
When you make pickled walnuts, you’re preserving a seasonal ingredient that’s otherwise inedible in its raw state.
The pickling process removes the bitterness and transforms the hard, green fruit into something soft, dark, and deeply flavorful.
Plus, learning how to make pickled walnuts connects you to an old culinary tradition that’s both practical and rewarding.
1. They’re a Versatile Condiment
Pickled walnuts pair beautifully with sharp cheddar, blue cheese, and crusty bread.
You can also chop them into salads, serve them alongside roasted meats, or use them in sandwiches for a burst of acidity.
Once you know how to make pickled walnuts, you’ll always have a jar ready to elevate your meals.
2. The Process Is Simple
Making pickled walnuts requires just a few ingredients: green walnuts, salt, vinegar, sugar, and spices.
The hardest part is waiting for them to pickle, but the actual steps are easy to follow.
If you can boil water and measure vinegar, you can make pickled walnuts without any special equipment.
3. They Last for Years
When you make pickled walnuts properly, they can last for several years in a cool, dark pantry.
That means one afternoon of work can stock your shelves with jars of homemade pickled walnuts for seasons to come.
How to Make Pickled Walnuts: Step-by-Step
Now that you know why it’s worth learning how to make pickled walnuts, let’s get into the actual process.
Follow these steps carefully, and you’ll have perfect pickled walnuts every time.
1. Harvest Green Walnuts
The first step in how to make pickled walnuts is gathering your walnuts at the right time.
You need unripe, green walnuts that are still soft enough to pierce with a needle.
This window is usually late June to mid-July, depending on your climate.
If the shell has started to harden inside, it’s too late to make pickled walnuts with those nuts.
Wear gloves when harvesting because green walnuts stain your hands with a stubborn brown dye.
2. Prick and Soak in Brine
After harvesting, prick each walnut all over with a fork or needle.
This helps the brine penetrate and speeds up the process of how to make pickled walnuts.
Place the pricked walnuts in a large bowl and cover them with a saltwater brine made from 4 ounces of salt per quart of water.
Let them soak for about 10 days, stirring them daily and replacing the brine every few days.
This brine soak is crucial when you make pickled walnuts because it removes the bitterness.
3. Dry and Air the Walnuts
Once the brine soak is done, drain the walnuts and spread them out on a tray.
Leave them in a sunny spot or a warm, airy room for 2 to 3 days until they turn black and hard on the outside.
This drying step is what gives pickled walnuts their signature dark, wrinkled appearance.
If you skip this step, your pickled walnuts won’t develop the right texture or flavor.
4. Prepare the Pickling Spice
To make pickled walnuts taste authentic, you’ll need a good pickling spice blend.
Combine black peppercorns, allspice berries, cloves, cinnamon stick, and a bit of ginger in a spice bag.
Some recipes also add mustard seeds or bay leaves for extra depth.
This aromatic blend is what makes homemade pickled walnuts so much better than store-bought versions.
5. Make the Vinegar Solution
In a large pot, combine malt vinegar, sugar, and your spice bag.
Bring the mixture to a boil, then reduce the heat and simmer for about 10 minutes.
The sugar balances the sharpness of the vinegar, which is essential when you make pickled walnuts.
Taste the solution and adjust the sweetness or spice level to your liking.
6. Pack and Pour
Pack the dried, black walnuts into sterilized jars, leaving about half an inch of headspace.
Pour the hot vinegar solution over the walnuts, making sure they’re completely covered.
Seal the jars with sterilized lids and store them in a cool, dark place.
This is the moment when you’ve officially learned how to make pickled walnuts from scratch.
7. Wait for the Magic
The final step in how to make pickled walnuts is patience.
Let the jars sit for at least 6 to 8 weeks before opening them.
The flavor deepens over time, so pickled walnuts made months in advance taste even better.
Once opened, store them in the fridge and enjoy them within a few months.
Tips for Perfect Pickled Walnuts
Learning how to make pickled walnuts is one thing, but mastering the craft takes a few extra pointers.
Always use the freshest green walnuts you can find, as older ones won’t pickle as well.
Keep everything sterile when you make pickled walnuts to prevent spoilage.
And don’t be afraid to experiment with your spice blend to make pickled walnuts that suit your taste.
So, How Do You Make Pickled Walnuts?
You make pickled walnuts by harvesting green walnuts, soaking them in brine, drying them until black, and preserving them in a spiced vinegar solution.
The process takes time, but the reward is a jar of tangy, complex pickled walnuts that elevate any cheese board or ploughman’s lunch.
Now that you know how to make pickled walnuts, you can carry on this old British tradition in your own kitchen.
Give it a try this summer, and you’ll be enjoying your homemade pickled walnuts for years to come.