How To Can Pumpkin Puree In A Jar

You can can pumpkin puree in a jar, but only if you use a pressure canner, not a water bath.
 
Pumpkin is a low-acid food, which means it needs high heat to be safely preserved.
 
If you’ve been wondering how to can pumpkin puree in a jar the right way, you’re in the right place.
 
In this post, we’ll walk through why pressure canning is a must, how to can pumpkin puree in a jar step by step, and the common mistakes that can ruin your batch.
 

Why You Can Pumpkin Puree in a Jar Safely

You can can pumpkin puree in a jar safely, but only when you follow tested pressure canning guidelines.
 
Here’s what makes it work:
 

1. Pumpkin Is a Low-Acid Food

Pumpkin has a pH above 4.6, which puts it in the low-acid category.
 
Low-acid foods can harbor dangerous bacteria like Clostridium botulinum.
 
That’s why you can can pumpkin puree in a jar only with a pressure canner that reaches 240°F (116°C).
 
A boiling water bath simply can’t get hot enough to make it safe.
 

2. The USDA Changed Its Stance

For years, home canners were told never to can pumpkin puree because it’s too dense.
 
The concern was that heat couldn’t penetrate the thick mash evenly.
 
Today, the USDA says you can can pumpkin puree in a jar as long as you follow their tested process.
 
That means pressure canning pint jars for 60 minutes and quart jars for 90 minutes.
 

3. Cubing vs. Pureeing

You can also can cubed pumpkin, which is simpler because the pieces are less dense.
 
But if you want the convenience of a smooth puree for pies and soups, you can can pumpkin puree in a jar and skip the blending step later.
 
Just know that puree requires a bit more care to keep it safe.
 

How to Can Pumpkin Puree in a Jar Step by Step

Learning how to can pumpkin puree in a jar isn’t hard once you know the process.
 
Here’s how to do it:
 

1. Prep Your Pumpkin

Start by washing and cutting your pumpkin in half.
 
Scoop out the seeds and stringy pulp, then roast the halves at 350°F until the flesh is soft.
 
Once it cools, scoop the flesh out and blend it until smooth.
 
You can can pumpkin puree in a jar much more easily when the puree is thick but not watery.
 

2. Get Your Jars and Canner Ready

Wash your jars, lids, and bands in hot soapy water and keep them warm.
 
Fill your pressure canner with the recommended amount of water and let it heat up.
 
You can can pumpkin puree in a jar in either pints or quarts, so pick the size that fits your family’s needs.
 

3. Fill the Jars

Spoon the puree into your jars, leaving 1 inch of headspace at the top.
 
Use a bubble remover or a thin spatula to release trapped air bubbles.
 
Wipe the rims clean, then place the lids and bands on finger-tight.
 

4. Pressure Can the Jars

Load the jars into your pressure canner and lock the lid.
 
Once it vents steam for 10 minutes, add the weighted gauge and let the pressure build.
 
Process pints for 60 minutes and quarts for 90 minutes at 10 pounds of pressure (adjust for altitude).
 

5. Cool and Check the Seals

After processing, turn off the heat and let the canner depressurize naturally.
 
Open the lid, remove the jars, and let them cool for 12 to 24 hours.
 
Press the center of each lid to confirm the seal, and you’ll know you can can pumpkin puree in a jar successfully.
 

Common Mistakes to Avoid When You Can Pumpkin Puree in a Jar

Even when you can pumpkin puree in a jar with the best intentions, a few slip-ups can ruin everything.
 
Watch out for these:
 

1. Using a Water Bath Canner

This is the biggest mistake when you can pumpkin puree in a jar.
 
A water bath canner won’t reach the temperature needed to kill botulism spores.
 
Always use a pressure canner.
 

2. Mashing the Puree Too Thin

If your puree is watery, it can separate or change texture over time.
 
Drain excess liquid before you can pumpkin puree in a jar so the consistency stays right.
 

3. Skipping the Headspace

Leaving too little headspace can cause siphoning and seal failures.
 
Always leave 1 inch when you can pumpkin puree in a jar.
 

4. Forgetting Altitude Adjustments

If you live above 1,000 feet, you’ll need more pressure.
 
Check your local guidelines before you can pumpkin puree in a jar at high altitude.
 

So, Can Pumpkin Puree in a Jar?

You can can pumpkin puree in a jar, and it’s a great way to enjoy homegrown pumpkin all year.
 
Just remember that it must be done in a pressure canner for the full 60 to 90 minutes.
 
Avoid water bath canning, keep your headspace right, and adjust for altitude.
 
When you can pumpkin puree in a jar the safe way, you get rich, ready-to-use pumpkin for pies, soups, and breads whenever you want.
 
So grab your pressure canner and your pumpkin, and you can can pumpkin puree in a jar like a pro.