How Do You Can Pumpkin Puree

You can pumpkin puree at home with just a few simple steps and a little patience.
 
The process is easier than most people think, and the result is a rich, silky puree that beats anything you’ll find in a can.
 
If you’ve ever wondered how do you can pumpkin puree so you can enjoy it all year long, you’re in the right place.
 
In this post, we’ll walk through how to can pumpkin puree safely, why the USDA actually recommends a different approach, and the exact steps to get it right.
 
Let’s dive in.
 

How Do You Can Pumpkin Puree Safely?

When you can pumpkin puree at home, safety has to come first.
 
The reason is simple: pumpkin is a low-acid food, and low-acid foods don’t play well with basic water bath canning.
 
They need the intense heat of a pressure canner to kill off dangerous bacteria like Clostridium botulinum.
 
So when you can pumpkin puree, you absolutely must use a pressure canner, not a boiling water bath.
 
Here’s the thing, though: the USDA actually advises against canning pumpkin puree in jars at all.
 
The puree is so thick and dense that heat can’t reliably penetrate to the center of the jar.
 
That means even in a pressure canner, there’s a risk that some spores survive.
 
Instead, the recommended method is to can cubed pumpkin instead of puree, then mash it into puree when you’re ready to use it.
 
That said, many home canners still can pumpkin puree successfully by following strict pressure canning guidelines.
 
If you choose to do it, you’ll want to take every precaution seriously.
 
 

1. Start With the Right Pumpkin

Not all pumpkins are created equal when it comes to canning pumpkin puree.
 
Sugar pumpkins, also called pie pumpkins, are your best bet because they’re sweeter, less stringy, and have firmer flesh.
 
Those giant jack-o’-lantern pumpkins look fun, but they’re watery and bland, which makes for a sad puree.
 
Pick a pumpkin that feels heavy for its size and has no soft spots or bruises.
 
 

2. Cook the Pumpkin First

You can’t can raw pumpkin puree, so the pumpkin needs to be cooked before it ever touches a jar.
 
Wash the pumpkin, cut it in half, and scoop out the seeds and stringy bits.
 
Roast the halves cut-side down on a baking sheet at 350°F until the flesh is fork-tender, usually about 45 minutes to an hour.
 
Once it’s cool enough to handle, scoop out the flesh and blend or mash it until smooth.
 
 

3. Keep the Puree Loose, Not Thick

Here’s a tip that makes a huge difference when you can pumpkin puree: don’t make it too thick.
 
A dense, paste-like puree is exactly what makes heat penetration so unreliable.
 
You can loosen it with a little water or even some lemon juice to help with acidity and color.
 
Aim for a consistency closer to applesauce than peanut butter.
 
 

Steps to Can Pumpkin Puree in a Pressure Canner

Once your puree is ready, the canning process itself is pretty straightforward if you stay organized.
 
 

1. Prep Your Jars and Canner

Wash your jars, lids, and bands in hot soapy water and keep the jars hot until you’re ready to fill them.
 
Fill your pressure canner with the recommended amount of water and get it heating up.
 
 

2. Fill the Jars With Puree

Spoon the puree into hot jars, leaving about an inch of headspace at the top.
 
Use a bubble remover or a thin spatula to release trapped air bubbles, then wipe the rims clean.
 
 

3. Process at the Right Pressure

This is the part where you can pumpkin puree correctly or ruin the whole batch.
 
For pint jars of pumpkin puree, process at 11 pounds of pressure for 60 minutes if you’re below 2,000 feet elevation.
 
For quart jars, bump that up to 90 minutes.
 
Adjust the pressure for higher altitudes based on your canner’s manual.
 
 

4. Let the Canner Depressurize Naturally

Once the timer goes off, turn off the heat and let the canner cool completely on its own.
 
Don’t rush it by releasing the pressure manually, because that can cause jars to break or seal improperly.
 
 

5. Check the Seals and Store

After the jars cool for 12 to 24 hours, press the center of each lid to confirm it’s sealed.
 
If a lid pops up and down, that jar didn’t seal and needs to go in the fridge for immediate use.
 
Store sealed jars in a cool, dark place and use them within a year for the best quality.
 
 

Common Mistakes to Avoid When You Can Pumpkin Puree

Even experienced canners run into trouble when they can pumpkin puree, so watch out for these pitfalls.
 
 

1. Using a Water Bath Instead of a Pressure Canner

This is the biggest mistake, and it’s a dangerous one.
 
Water bath canning simply doesn’t get hot enough to make pumpkin puree safe.
 
 

2. Making the Puree Too Dense

Thick puree blocks heat from reaching the center of the jar, which is exactly why the USDA warns against it.
 
Keep it loose and you’ll have a much safer product.
 
 

3. Skipping the Altitude Adjustments

If you live at a higher elevation, you need to increase your pressure accordingly.
 
Ignoring this step means your pumpkin puree might not reach a safe temperature.
 
 

So, How Do You Can Pumpkin Puree?

You can pumpkin puree by cooking the pumpkin first, keeping the puree loose, and pressure canning it at the correct pressure and time.
 
Just remember that the USDA recommends canning cubed pumpkin instead, since puree is dense enough to pose a real safety risk.
 
If you do can pumpkin puree, follow every safety step carefully and never cut corners.
 
Whether you can pumpkin puree or freeze it, you’ll end up with a delicious homemade ingredient that’s perfect for pies, soups, and cozy fall recipes.