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This Blueberry Freezer Jam is beyond simple to make and has an incredibly fresh taste. Just a few simple ingredients and 20 minutes (including clean up!), and you’ll have homemade low-sugar blueberry jam in a flash.
Even if you only have 20 minutes, you can still whip up this low-sugar blueberry jam recipe. For a tiny bit of work now, you’ll have the taste of summer sunshine ready for toast, pancakes, or yogurt to enjoy all winter long.
With all my other freezer jam recipes, I don’t cook/heat anything. Just mash, stir and freeze. But, with blueberry freezer jam, we’re going to do a tiny bit of cooking, simply because it makes the berry skins less annoying in the final product.
If you want to make a purely no-cook blueberry jam, I’ve also included those instructions in the recipe card.
Ingredient notes:
- Blueberries – you can use fresh or frozen!
- Sugar – my recipe is already low in sugar compared to other blueberry freezer jam recipes. If you lower the sugar even more, please note, the consistency of the final product will be impacted.
- Freezer jam pectin – this recipe is written using freezer jam pectin, which is different than traditional pectin. See FAQ further in the post about using other kinds of pectins.
- Lemon zest – I love the brightness this brings to the recipe. Save the rest of the lemon for other recipes or check out our tutorial on freezing lemons.
HOW LONG DOES FREEZER JAM LAST?
Low-sugar blueberry jam is good for three weeks in the fridge or 9-12 months in the freezer.
PRO TIPS/RECIPES NOTES:
- No food processor for pulsing the berries? Try using a potato masher or pastry cutter to crush the berries one layer at a time.
- If you’re using glass jars, make sure you leave 1/2 inch of headspace when filling them. Headspace is the space between the top of the food and the top of the jar. You need to give the jam a bit of room to expand in the freezer to keep the jars from cracking.
- You’ll need about 5 cups of whole blueberries to yield 3 cups of smashed blueberries.
- After the initial cooking process, the jam will seem very runny. It will thicken as it cools and after a few hours in the fridge/freezer.
- Once the jam has rested for 2 hours, it is ready to use. You don’t have to freeze it first.
You’ll also want to check out our strawberry freezer jam, raspberry freezer jam, peach freezer jam, or blackberry freezer jam.
If you’re looking for a shelf-stable jam recipe, try your hand at blueberry rhubarb jam, low-sugar strawberry jam, peach preserves, cherry jam, or strawberry rhubarb jam, which are actual canning recipes. They’re still incredibly easy but you’ll need some canning equipment.
Blueberry Freezer Jam
Ingredients
- 3 cups crushed blueberries {~5 cups fresh blueberries}
- 3/4 cup white grape juice
- 1 tbsp lemon zest
- 1/3 cup freezer jam pectin {see notes in post on using other kinds of pectin}
- 1 1/4 cup sugar
Instructions
- Pulse blueberries in a food processor, or gently crush 1 layer at a time with a potato masher or pastry cutter. Set aside.3 cups crushed blueberries
- In a heavy-bottomed saucepan, combine 3/4 cup white grape juice and 1 tbsp lemon zest. Bring to a low boil.3/4 cup white grape juice, 1 tbsp lemon zest
- Whisking constantly, slowly add the pectin into the juice mixture until fully incorporated. Cook for 1 minute at a low boil, whisking constantly.1/3 cup freezer jam pectin
- Add the crushed blueberries and 1 1/4 cup sugar to the juice/pectin mixture. Stir to incorporate.1 1/4 cup sugar
- Bring to a gentle boil and cook for 1 minute while stirring constantly. Reduce heat slightly if the jam begins popping.
- Remove from heat and continue to stir gently for 3 minutes.
- Use a funnel and ladle the jam mixture into your preferred containers, leaving 1/2 inch of space between the tops of the jam and the tops of the jars.
- Place lids on the jars, and allow them to sit at room temperature for 2 hours.
- Freeze jam or store in the fridge for up to 3 weeks.
Notes
- Good for three weeks in the fridge or 9-12 months in the freezer.
- Jam is ready to use after the 2-hour rest. It does not need to be frozen first to be ready to use.
- Pulse blueberries in a food processor, or gently crush 1 layer at a time with a potato masher or pastry cutter.
- Stir in sugar, lemon juice, and let sit for 15 minutes.
- Add pectin and stir constantly for 3 minutes.
- Pour into jars, leaving 1/2 of headspace.
- Put lids on and allow the jars to sit at room temp for 2 hours.
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.
Do I have to use grape juice? Can I use water?
Technically you could use water, but the flavor and texture will be different without the grape juice. Your jam’s texture will be closer to a blueberry sauce.
Hello,
My grocery store did not have white grape juice. Can I use concord grape juice in the blueberry freezer jam recipe instead?
Yes, you can. That being said, concord grape juice usually has more sugar in it. Just something to consider if you are watching sugar for health reasons.