Homemade Zucchini Relish Recipe for Canning

This easy homemade zucchini relish recipe is a fantastic way to capture the fresh, vibrant flavors of summer! It blends zucchini, onions, and bell peppers with tangy vinegar to create a delicious condiment that’s perfect for jazzing up sandwiches and burgers.

Plus, by canning it, you can enjoy this bright, tasty relish all year long! I love spooning it onto my hot dogs for an extra flavor boost. And honestly, making this relish at home is a fun, satisfying way to spend time in the kitchen—it’s simple and rewarding!

If you’ve ever wondered how to use up a big batch of summer zucchini, this easy homemade zucchini relish recipe is your go-to solution. It transforms fresh zucchini, onions, and bell peppers into a tangy-sweet, crisp relish that adds a pop of flavor to sandwiches, burgers, hot dogs, and more — and because it’s made with canning in mind, you’ll get to savor that fresh summer goodness long after the season ends.

In the details below, you’ll find everything to guide you through making and preserving this relish: a straightforward ingredients list with common pantry goodies (vinegar, sugar, mustard and celery seeds, turmeric), detailed steps for salting, rinsing, cooking, and safely processing jars in a boiling water bath, plus handy tips to keep your veggies perfectly crunchy. You’re looking at about 30 minutes of hands-on prep, roughly 2 hours for the salting and resting phase, and a final cooking plus canning session—about 2 and a half hours total from start to finish.

• Here’s a quick rundown of the process: chop → salt and rest → rinse and drain → simmer in a tangy vinegar mixture → jar it and water-bath can.
• I’ll share helpful tips later that help preserve the crunch and let you tweak the flavor — whether that’s less sugar, swapping vinegars, or adding a little heat.
• The instructions cover how to safely seal your jars so your relish stores well in a cool, dark spot for months. And if you open a jar? No problem—keep it in the fridge.

Whether your zucchini came from your backyard garden or the store shelf, this zucchini relish recipe walks you through every step so you end up with a bright, crisp relish you’ll want to have on hand all year long.

Why This Relish Works

This zucchini relish recipe bottles up the fresh, sunny flavors of summer and turns a big zucchini harvest into a tangy, sweet treat you can enjoy any time. It’s straightforward to make, uses simple ingredients you likely already have (vinegar, sugar, mustard seed, celery seed, turmeric), and cooks quickly enough to keep the veggies crunchy instead of mushy.

• Preserves your summer zucchini at its tastiest — perfect for using up garden extras.
• Crunchy texture thanks to salting, rinsing, and brief cooking steps.
• A well-balanced sweet-and-tangy flavor that brightens sandwiches, burgers, hot dogs—you name it.
• Customizable — swap in yellow squash, try apple cider vinegar, or add jalapeños for a spicy twist.
• Made for safe canning — process in a boiling water bath for shelf stability, or refrigerate after opening.
• Total active hands-on time is about 30 minutes, with some waiting around for the veggies to rest and the jars to process, adding up to roughly 2.5 hours overall.

Ingredients and Smart Swaps

• 6 cups finely chopped zucchini (roughly 4 medium zucchinis)
• 3 cups finely chopped onions
• 2 cups finely chopped green bell pepper
• 1 cup finely chopped red bell pepper
• 1/4 cup pickling salt
• 6 cups white vinegar (5%)
• 6 cups granulated sugar
• 1 tablespoon mustard seed
• 1 tablespoon celery seed
• 1 tablespoon ground turmeric

Make and Can the Relish

1. Wash all vegetables thoroughly.
2. Finely chop 6 cups zucchini, 3 cups onions, 2 cups green bell pepper, and 1 cup red bell pepper.
3. Place chopped vegetables in a large bowl and sprinkle with 1/4 cup pickling salt; stir to distribute.
4. Let the salted vegetables rest for about 2 hours, stirring occasionally.
5. Rinse the vegetables thoroughly under cold running water to remove excess salt.
6. Drain the vegetables very well, pressing or squeezing gently to remove as much water as possible.
7. In a large pot, combine 6 cups white vinegar (5%), 6 cups granulated sugar, 1 tablespoon mustard seed, 1 tablespoon celery seed, and 1 tablespoon ground turmeric.
8. Heat the vinegar mixture over medium heat, stirring until the sugar dissolves and it comes to a boil.
9. Add the well-drained vegetables to the boiling vinegar mixture.

10. Bring the mixture back to a boil and cook for about 10 minutes, stirring occasionally.
11. While the relish cooks, sterilize canning jars and lids by boiling them for at least 10 minutes and keep the jars hot.
12. Ladle the hot relish into sterilized jars, leaving 1/2 inch headspace.
13. Wipe jar rims clean, place sterilized lids on jars, and screw on bands fingertip-tight.
14. Process the filled jars in a boiling water bath for 10 minutes, ensuring jars are fully submerged (adjust time for altitude if needed).
15. Remove jars with jar tongs and let them cool undisturbed for 12–24 hours.
16. Check seals by pressing the center of each lid; refrigerate any jars that did not seal.

Keeping Your Relish Crisp

To get that perfect crunch in your zucchini relish, the salting and rinsing steps are essential. Here’s what to keep in mind:

• Mix chopped zucchini and onions with the pickling salt and let rest. This pulls moisture out and helps the veggies stay crisp.
• Rinse the vegetable mix well after resting to remove extra salt so your relish won’t be overpowering.
• Cook the veggies only briefly—just enough to blend flavors and heat through without turning soft or mushy.

Stick with these tips, and your zucchini relish will come out with that awesome crunch and fresh flavor you want every time. Happy canning!

If you’d prefer a less sweet relish, it’s absolutely fine to cut back the sugar by about a cup. Just remember, sugar helps with preserving and flavor balance, so reducing too much means you might want to enjoy it sooner or tweak your canning routine.

Mix-Ins and Flavor Variations

Definitely make this zucchini relish recipe your own! While the classic version uses zucchini, onions, and bell peppers, you can easily add diced carrots for extra sweetness or chopped jalapeños if you like a little heat. Just keep the veggie ratios close for the best balance of flavor and texture.

How to Store and Preserve

Once opened, keep your jars in the fridge, where the relish will stay fresh for up to 4 weeks. Unopened, canned jars can be stored in a cool, dark spot for up to a year. Before digging in, always check for signs of spoilage just to be safe.

Don’t forget to wipe your jar rims clean before sealing to avoid any residue that could interfere with the seal. During water bath processing, make sure jars are fully covered with water and aren’t packed too tightly. If you’re using a pressure canner or altitudes differ, follow your equipment’s instructions carefully for best results.

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