How Do You Can Butternut Squash

You can butternut squash in a few simple ways, and it’s one of the easiest ways to preserve this sweet, nutty vegetable for months.
 
Whether you pressure can it or freeze it, learning how to can butternut squash gives you a ready-to-use ingredient for soups, casseroles, and baby food all winter long.
 
Canning butternut squash is safe when you follow tested methods because squash is a low-acid food that needs pressure canning, not a water bath.
 
In this post, we’ll walk through how to can butternut squash step by step, why the pressure canner matters, and the best ways to store your jars so they stay fresh.
 
Let’s get into it.

How Do You Can Butternut Squash Safely?

You can butternut squash safely by using a pressure canner, and here’s why that matters.

1. Butternut Squash Is a Low-Acid Food

Butternut squash has a pH level that puts it firmly in the low-acid category.
 
That means boiling water baths won’t kill the bacteria that can cause botulism.
 
When you can butternut squash, only a pressure canner reaches the 240°F needed to destroy those spores.
 
This is the single most important rule when you can butternut squash at home.

2. Choose a Ripe, Firm Squash

Pick a butternut squash that feels heavy and has a solid, unblemished skin.
 
The flesh should be deep orange and firm, not stringy or mushy.
 
A ripe squash cubes cleanly, which makes the whole process of how to can butternut squash much easier.

3. Peel, Seed, and Cube the Squash

Start by peeling the squash with a sharp vegetable peeler.
 
Cut off both ends, slice it in half lengthwise, and scoop out the seeds.
 
Then cut the flesh into uniform one-inch cubes so they pack and heat evenly.
 
Uniform cubes are key whenever you can butternut squash because uneven pieces can lead to uneven processing.

How to Can Butternut Squash in a Pressure Canner

Once your squash is cubed, the actual canning process is straightforward.

1. Prep Your Jars and Canner

Wash your jars, lids, and bands in hot soapy water, then keep the jars hot.
 
Fill your pressure canner with the recommended amount of water and set it on the stove.

2. Pack the Jars with Cubed Squash

Pack the raw cubes tightly into hot jars, leaving one inch of headspace.
 
Don’t mash the squash down because you want the pieces to stay intact.

3. Add Boiling Water

Cover the cubes with boiling water, still keeping that one-inch headspace.
 
Run a bubble freer around the inside of the jar to release trapped air.
 
Wipe the rims, center the lids, and screw on the bands until they’re fingertip tight.

4. Process at 10 or 11 PSI

Load the jars into your pressure canner and lock the lid.
 
For dial-gauge canners, process pints for 55 minutes and quarts for 90 minutes at 11 PSI.
 
For weighted-gauge canners, use 10 PSI with the same times.
 
Adjust for altitude if you live higher up, then let the canner depressurize naturally before opening.
 
This step is the heart of how to can butternut squash, so never rush it.

Other Ways to Preserve Butternut Squash

If you don’t have a pressure canner, you still have options for putting up squash.

1. Freeze the Cubes Instead

Freezing is the simplest alternative when you can butternut squash for later use.
 
Blanch the cubes for three minutes, cool them in ice water, then freeze on a tray before bagging.

2. Cook and Puree for the Freezer

Roast or steam the squash, mash it smooth, and freeze the puree in portioned bags.
 
This puree works great in pies, soups, and quick breads.

3. Store Whole Squash in a Cool Spot

A whole butternut squash keeps for months in a cool, dark place.
 
That’s the laziest way to preserve squash, but it works beautifully.

So, How Do You Can Butternut Squash?

You can butternut squash by pressure canning cubed pieces in boiling water for 55 to 90 minutes, depending on jar size.
 
Because squash is a low-acid food, the pressure canner is non-negotiable when you can butternut squash at home.
 
Peel, cube, pack, and process carefully, and you’ll have shelf-stable squash ready for any recipe.
 
Hope this post has helped you understand how to can butternut squash and given you the confidence to fill your pantry this season.