How Long Do You Pressure Can Butternut Squash

You pressure can butternut squash for about 15 minutes for cubed pieces and around 25 to 30 minutes for larger chunks, depending on your altitude and the size of the pieces.
 
The exact time for how long to pressure can butternut squash depends on whether it’s cut into cubes or left in bigger chunks.
 
Either way, pressure canning is the only safe method for preserving butternut squash because it’s a low-acid vegetable.
 
So if you’ve been wondering how long do you pressure can butternut squash, this post will walk you through the timing, the prep, and the safety rules.
 
Let’s get into it so your canned squash turns out perfect every single time.
 

How Long Do You Pressure Can Butternut Squash?

How long you pressure can butternut squash comes down to a few key factors.
 
The USDA recommends 55 minutes at 10 pounds of pressure for cubed squash in pint jars.
 
For quart jars, that jumps to 90 minutes at the same pressure.
 
If you’re pressure canning butternut squash in larger chunks, stick to the same times because the density of the flesh matters more than the shape.
 
Altitude changes things too, so you’ll need to adjust your pressure if you live above 2,000 feet.
 
Here’s the breakdown so you can pressure can butternut squash with confidence:

1. Cubed Squash in Pint Jars

When you pressure can butternut squash that’s been cut into 1-inch cubes, process pint jars for 55 minutes at 10 pounds of pressure.
 
Cubes pack more evenly, so the heat penetrates the pieces consistently.
 
This is the go-to option if you plan to use your canned squash for soups, stews, or casseroles later.
 

2. Cubed Squash in Quart Jars

If you’re pressure canning butternut squash in quart jars, the time goes up to 90 minutes.
 
Bigger jars take longer for heat to reach the center, which is why the extra time matters for safety.
 
Quart jars are great when you’ve got a big harvest and want fewer jars to store.
 

3. Altitude Adjustments

When you pressure can butternut squash above 2,000 feet, you’ll need to increase your dial-gauge pressure.
 
For 2,001 to 4,000 feet, use 11 pounds; for 4,001 to 6,000 feet, use 12 pounds.
 
A weighted-gauge canner stays at 10 pounds up to 1,000 feet, then goes to 15 pounds above that.
 
Getting this right is a must when you preserve butternut squash so it stays safe to eat.
 

How to Prep Butternut Squash for Pressure Canning

Prepping your squash properly makes the whole process of pressure canning butternut squash easier and safer.
 
Start by washing the outside of the squash to remove any dirt.
 
Then peel it, scoop out the seeds, and cut the flesh into 1-inch cubes.
 
You can also leave it in larger chunks, but keep them uniform so they heat evenly.
 
Once your squash is prepped, it’s time to fill your jars.

1. Raw Pack or Hot Pack

You can pressure can butternut squash using either a raw pack or a hot pack method.
 
For a raw pack, simply fill clean jars with raw cubed squash and cover with boiling water, leaving 1 inch of headspace.
 
For a hot pack, boil the cubes in water for 2 minutes, then pack them into jars and cover with the hot cooking liquid.
 
The hot pack tends to give better color and texture, but both work when you pressure can butternut squash.
 

2. Add Salt and Remove Air Bubbles

Add 1/2 teaspoon of canning salt per pint or 1 teaspoon per quart, though this is optional.
 
Then run a plastic bubble remover or a thin spatula around the inside of the jar to release trapped air.
 
Skipping this step is a common mistake when you pressure can butternut squash, and it can leave too much air inside.
 

3. Wipe Rims and Seal

Wipe the jar rims with a clean, damp cloth to make sure they’re free of any squash residue.
 
Place a lid on each jar and screw the band on until it’s fingertip tight.
 
Now your jars are ready to go into the pressure canner.
 

Why You Must Pressure Can Butternut Squash

You can’t just water bath butternut squash because it’s a low-acid vegetable.
 
The only safe way to preserve butternut squash is with a pressure canner that reaches 240°F.
 
That temperature is what kills the bacteria and spores that cause botulism.
 
So when you pressure can butternut squash, you’re following the same safety rule that applies to carrots, beans, and corn.
 
Never skip the pressure canner when you preserve butternut squash, no matter what anyone online tells you.
 

So, How Long Do You Pressure Can Butternut Squash?

You pressure can butternut squash for 55 minutes in pint jars and 90 minutes in quart jars at 10 pounds of pressure.
 
Just remember to adjust for altitude and always use a tested pressure canning method.
 
Once you know how to pressure can butternut squash, you’ll have shelf-stable squash ready for soups, pies, and side dishes all year long.
 
Happy canning.