How Do You Can Pumpkin Puree

You can can pumpkin puree at home using a simple water bath canning method.
 
It’s a rewarding process that lets you preserve the flavors of fall for months, but it’s important to follow safe canning practices because pumpkin is a low-acid vegetable.
 
When you can pumpkin puree, you’re essentially sealing cooked, blended pumpkin in jars so it stays shelf-stable without refrigeration.
 
In this post, we’ll walk through exactly how you can pumpkin puree step by step, the equipment you need, safety considerations, and some tasty ways to use your canned puree later.
 
Let’s get started.
 

Why You Should Can Pumpkin Puree

Canning pumpkin puree is a great way to make the most of a bumper crop of pumpkins or a good deal on fresh squash at the farmers market.
 
When you can pumpkin puree, you control exactly what goes into the jar—no hidden preservatives, no added sugars, and no mystery ingredients.
 
Here’s why so many home cooks choose to can pumpkin puree.
 

1. It Saves Money and Reduces Waste

Fresh pumpkins are incredibly cheap in the fall, especially after Halloween when stores practically give them away.
 
If you can pumpkin puree yourself, you can stock your pantry for a fraction of what store-bought cans cost.
 
Plus, you avoid throwing away pumpkin flesh that would otherwise go to waste.
 

2. You Get Superior Flavor and Quality

Homemade pumpkin puree tastes fresher and richer than most canned versions.
 
When you can pumpkin puree at home, you’re preserving that sweet, earthy flavor at its peak.
 
The texture is often smoother and more vibrant, too, which makes a big difference in pies, soups, and baked goods.
 

3. It’s Convenient for Year-Round Baking

Having jars of pumpkin puree ready to go means you can whip up a pumpkin pie in July or a batch of pumpkin muffins in March without a trip to the store.
 
When you can pumpkin puree, you’re essentially capturing autumn and saving it for whenever you need it.
 
That convenience alone makes the process worth learning.
 

How to Can Pumpkin Puree Step by Step

Now let’s get into the actual process of how you can pumpkin puree safely and effectively.
 
The key is to use a pressure canner, not a water bath canner, because pumpkin is a low-acid food.
 
Here’s the full method.
 

1. Prepare Your Pumpkins

Start by choosing small, sweet pumpkin varieties like sugar pumpkins or pie pumpkins.
 
Wash them thoroughly, cut them in half, and scoop out the seeds and stringy pulp.
 
Place the halves cut-side down on a baking sheet and roast at 400°F (200°C) for about 45 minutes, or until the flesh is fork-tender.
 

2. Make the Puree

Once the pumpkin is cool enough to handle, scoop the flesh into a blender or food processor.
 
Blend until completely smooth—no lumps, no strings.
 
You can also use a food mill or potato masher if you prefer a more rustic texture, but a smooth puree cans better and looks nicer in the jar.
 

3. Fill Your Jars

Wash your canning jars, lids, and bands in hot, soapy water and keep them warm.
 
Ladle the pumpkin puree into the jars, leaving about 1 inch of headspace.
 
Use a bubble remover or a thin spatula to remove air bubbles, then wipe the rims clean with a damp cloth.
 
Place the lids on and screw the bands on fingertip-tight.
 

4. Process in a Pressure Canner

This is the most important step when you can pumpkin puree.
 
Place the jars in your pressure canner with 2-3 inches of water in the bottom.
 
Seal the canner and bring it to the correct pressure based on your altitude—usually 10 pounds of pressure for weighted gauges or 11 pounds for dial gauges at sea level.
 
Process pint jars for 55 minutes and quart jars for 90 minutes.
 
Let the pressure drop naturally before opening the canner.
 

5. Cool and Store

Remove the jars with a jar lifter and let them cool undisturbed for 12-24 hours.
 
Check that the lids have sealed by pressing the center—if it doesn’t pop back, you’re good.
 
Label your jars and store them in a cool, dark place.
 
When you can pumpkin puree properly, it will keep for up to a year.
 

Safety Tips When You Can Pumpkin Puree

Canning pumpkin puree requires more caution than canning high-acid foods like pickles or jam.
 
Here’s what you need to keep in mind.
 

1. Never Use a Water Bath Canner

Pumpkin is a low-acid vegetable, which means it can harbor dangerous bacteria like Clostridium botulinum.
 
A water bath canner doesn’t get hot enough to kill those spores.
 
You must use a pressure canner when you can pumpkin puree to ensure it’s safe to eat.
 

2. Don’t Add Thickeners or Sugar

When you can pumpkin puree, keep it plain.
 
Don’t add flour, cornstarch, butter, or sugar before canning, as these can interfere with heat penetration and create unsafe conditions.
 
You can always add those ingredients later when you’re ready to use the puree.
 

3. Check Your Altitude

Altitude affects canning pressure and processing time.
 
If you live above 1,000 feet, you’ll need to adjust your pressure accordingly.
 
Always consult a reliable altitude chart when you can pumpkin puree to make sure you’re doing it safely.
 

So, How Do You Can Pumpkin Puree?

You can can pumpkin puree by roasting, blending, jarring, and pressure canning it properly.
 
It’s a straightforward process once you know the steps, and the payoff is a pantry full of fresh-tasting pumpkin ready for pies, soups, smoothies, and more.
 
Just remember to use a pressure canner, skip the thickeners, and always check your altitude.
 
When you can pumpkin puree the right way, you’ll enjoy the taste of fall all year long.