How To Can Zucchini Relish

You can make zucchini relish at home with just a few simple steps, and it’s one of the best ways to use up an overflowing garden.
 
If you’ve ever wondered how to can zucchini relish, the answer is easier than you might think.
 
It’s a tangy, sweet, and crunchy condiment that pairs perfectly with hot dogs, burgers, sandwiches, and even scrambled eggs.
 
The best part is that canning zucchini relish lets you enjoy that fresh summer flavor all year long.
 
In this post, we’ll walk through how to can zucchini relish step by step, from picking the right zucchini to processing the jars safely.
 
Let’s get started.
 

How to Can Zucchini Relish at Home

Learning how to can zucchini relish starts with understanding the basic process.
 
You’ll need fresh zucchini, onions, bell peppers, vinegar, sugar, and pickling spices.
 
The zucchini gets shredded, salted, and drained to remove excess water so the relish doesn’t turn out soggy.
 
Then everything gets simmered in a vinegar-based brine that gives zucchini relish its signature sweet-and-sour kick.
 
Once the mixture is hot and thick, it goes into sterilized jars and gets processed in a water bath canner.
 
That water bath step is what makes canned zucchini relish shelf-stable for months.
 
When you can zucchini relish properly, you’re creating a pantry staple that tastes way better than anything from the store.
 

1. Gather the Right Ingredients for Zucchini Relish

To make zucchini relish, you’ll need about 10 cups of shredded zucchini.
 
You’ll also need 4 cups of chopped onions and 2 cups of chopped bell peppers for color and crunch.
 
For the brine, grab 2 ½ cups of white vinegar, 3 cups of sugar, and 1 tablespoon of pickling salt.
 
Add mustard seeds, celery seeds, turmeric, and black pepper to give your zucchini relish that classic deli-style flavor.
 
Feel free to tweak the spices, but keep the vinegar-to-sugar ratio the same for safe canning.
 

2. Prep and Salt the Zucchini

Start by shredding your zucchini using a food processor or box grater.
 
Toss the shredded zucchini with ¼ cup of pickling salt and let it sit for at least 4 hours or overnight.
 
This step pulls out excess moisture so your zucchini relish stays crisp instead of mushy.
 
After soaking, rinse the zucchini thoroughly and squeeze out as much liquid as you can.
 
Skipping this step is the number one reason homemade zucchini relish turns out watery.
 

3. Simmer the Relish Mixture

In a large pot, combine the vinegar, sugar, and spices and bring them to a boil.
 
Add the drained zucchini, onions, and peppers and stir everything together.
 
Let the mixture simmer for about 20 to 30 minutes until it thickens up nicely.
 
Stir occasionally so nothing sticks to the bottom of the pot.
 
The goal is a glossy, slightly syrupy zucchini relish that coats the spoon.
 

Steps for Canning Zucchini Relish Safely

Once your zucchini relish is ready, it’s time to get those jars filled and processed.
 
Safety matters here because improper canning can lead to spoilage or worse.
 
Follow these steps so your canned zucchini relish turns out perfect every time.
 

1. Sterilize Your Jars and Lids

Wash your jars and lids in hot soapy water and keep them warm until you’re ready to fill them.
 
You can also run them through the dishwasher on a hot cycle or boil them for 10 minutes.
 
Keeping the jars hot prevents them from cracking when the hot zucchini relish goes in.
 

2. Fill the Jars and Remove Air Bubbles

Ladle the hot zucchini relish into your jars, leaving about ½ inch of headspace.
 
Run a plastic knife or bubble remover around the inside of each jar to release trapped air.
 
Wipe the rims clean, then place the lids on and screw the bands on until they’re fingertip-tight.
 

3. Process the Jars in a Water Bath Canner

Place the filled jars in a water bath canner with enough water to cover them by 1 to 2 inches.
 
Bring the water to a rolling boil and process pint jars of zucchini relish for 15 minutes.
 
Adjust the time if you’re at a higher altitude, adding 5 minutes for every 1,000 feet above sea level.
 
Once the time is up, turn off the heat and let the jars sit in the canner for 5 minutes.
 

4. Cool, Check Seals, and Store

Remove the jars and set them on a towel to cool completely for 12 to 24 hours.
 
You’ll hear that satisfying “pop” sound as the lids seal, which means your canned zucchini relish is shelf-stable.
 
Any jars that don’t seal should go straight into the fridge and be eaten within a few weeks.
 
Store your sealed jars of zucchini relish in a cool, dark place for up to a year.
 

Tips for the Best Canned Zucchini Relish

A few small tweaks can take your zucchini relish from good to absolutely amazing.
 
Use smaller zucchini for the best texture since oversized ones tend to be watery and seedy.
 
Don’t skip the salt-and-drain step, because it’s what keeps your zucchini relish crunchy.
 
Let the relish sit for at least two weeks after canning before you open a jar.
 
This resting period lets the flavors meld together so your zucchini relish tastes even better.
 
Label your jars with the date so you know exactly when you canned each batch.
 

So, How to Can Zucchini Relish?

You can zucchini relish by shredding fresh zucchini, salting and draining it, simmering it in a sweet vinegar brine, and processing the filled jars in a water bath canner.
 
The whole process is straightforward, and once you learn how to can zucchini relish, you’ll want to make a batch every summer.
 
Homemade zucchini relish beats store-bought every single time, and knowing how to can zucchini relish means you’ll never run out of this tangy, versatile condiment.
 
Grab your garden zucchini, fire up that water bath canner, and get ready to enjoy jars of delicious zucchini relish all year long.