Sweet and Sour Pickled Zucchini (Zucchini Pickles)
If you have a backyard zucchini glut, this sweet and sour pickle is the ultimate way to preserve your harvest. This recipe has been perfectly balanced to deliver that classic, tangy crunch without being overpowering.
Prep time: 20 mins | Cook time: 5 mins | Yields: Approx. 5–6 medium jars
Ingredients
- 2.0 to 2.5 kg fresh zucchini (Keep the skin on! See chopping guide below)
- 4 medium brown onions, peeled and chopped into bite-sized pieces
- 1000 ml water
- 470 ml white vinegar or wine vinegar (8% acidity)
- 300 g white sugar
- 5 tsp cooking salt
- 1 tsp ground turmeric (for that gorgeous golden hue)
- 1 tsp yellow mustard seeds
- 5 to 6 whole peppercorns (black or mixed)
- 2 whole allspice berries, slightly crushed
- 1 whole clove
- 1 small bay leaf, slightly torn to release the oils
- Optional: 2–3 garlic cloves, peeled
How to Chop Your Zucchini for Maximum Crunch
Zucchini softens very quickly when heated. To prevent your pickles from turning mushy, avoid thin slices or small dice. Choose one of these three sturdy cutting styles:
- Thick Coins (Rounds): Slice straight across the zucchini to create discs that are roughly 1 cm to 1.5 cm thick. This is the easiest method and ideal for small-to-medium zucchini.
- Half-Moons: Cut the zucchini in half lengthways first, then slice across into 1 cm to 1.5 cm thick half-moons. This is the best approach if your zucchini are quite wide, keeping the pieces perfectly bite-sized.
- Thick Batons (Sticks): Cut the zucchini into 5 cm logs, then slice each log lengthways into thick wedges or finger-sized sticks. This looks fantastic packed vertically into jars and is perfect for grazing boards.
Step-by-Step Instructions
- Prep the Veggies: Chop your zucchini using one of the structural styles above. Cut your peeled onions into matching bite-sized pieces so everything cooks evenly.
- Simmer the Brine: In a large, non-reactive stainless steel pot, combine the water, 8% acidity vinegar, sugar, salt, and ground turmeric. Toss in your whole spices (mustard seeds, peppercorns, crushed allspice, clove, bay leaf, and garlic if using). Bring the mixture to a rolling boil over medium-high heat, stirring occasionally until the sugar and salt have completely dissolved.
- Cook the Vegetables: Carefully drop the chopped zucchini and onions into the boiling brine. Let everything cook at a vigorous boil for exactly 2 to 3 minutes. You want the zucchini to absorb the flavours while still retaining a distinct bite.
- Jar It Up: Using a clean ladle, immediately transfer the hot vegetables and boiling liquid into your prepared, sterile jars. Ensure the liquid completely covers the zucchini chunks, leaving about 1–2 cm of headspace at the top. The whole spices will naturally distribute themselves among the jars.
- Seal and Cool: Wipe the rims of the jars with a clean paper towel to ensure a perfect seal. Screw the lids on tightly. Leave them on the counter to cool down to room temperature undisturbed.
Pro Tips for Perfect Pickling
- Sterilising Your Jars: Food safety is key when preserving. Thoroughly wash your jars and lids in hot, soapy water and rinse them well. Just before bottling, carefully submerge or rinse both the jars and the lids with freshly boiled water from the kettle, then let them air-dry upside down on a clean tea towel. Alternatively, place the wet, washed jars into an oven preheated to 110°C for 10–15 minutes.
- Dealing with “Monster” Zucchini: If you are using very large, overgrown homegrown zucchini, cut them lengthways first and use a spoon to scrape out the spongy, seedy center before slicing. The soft center holds too much water and will dilute your brine, making the pickles soggy.
- Skip the Inversion Trick: You might see old recipes telling you to turn filled jars upside down to seal them. Avoid this! The high acidity of the vinegar brine can corrode or damage the plastic lining on the inside of modern lids over time. Keeping them upright is safer and seals just as well as the liquid cools.
- The Waiting Game: While you can technically eat these the next day, the flavours improve massively if you let the jars sit in a dark, cool pantry for at least 1 to 2 weeks to mature.
- Storage: Once sealed and popped (you’ll hear the vacuum safety button on the lid click down as it cools), these pickles will keep on your shelf for up to a year. Once you open a jar, store it in the fridge and consume it within a few weeks.