Keto Blueberry Freezer Jam with Perfect Spoonable Texture

Berry season is here and fresh berries are popping up everywhere. I found several pints of blueberries on sale this week and made a batch of early-season jam for the pantry and freezer. First up: a simple, delicious keto blueberry freezer jam that’s perfect for preserving the taste of summer.

I’ve made sugar-free blueberry jam before with great results, including a shelf-stable canning version. If you need a shelf-stable recipe, look for one intended for water-bath canning. For a quick, no-cook freezer jam you can make in about 30 minutes, this recipe is hard to beat. It produces the classic freezer-jam texture and lets you control sweetness to taste.

A sugar-free Blueberry Freezer jam – you won’t believe how easy it is!

What you’ll need:

• A blender or food processor to dissolve the pectin (a stick blender works fine).
• Pomona’s Pectin — a 100% sugar-free pectin that uses calcium to gel instead of sugar.
• Freezer-safe jars for storage.
• About 30 minutes total time.
• Sweetener of your choice — I recommend allulose or Bocca Sweet for best texture; other sweeteners are discussed below.

The Pectin Issue in Sugar-free Jam Making

Many low- or no-sugar pectins include dextrose as a bulking agent, and labels don’t always make it easy to see how that affects carbs per serving. Because serving sizes are often tiny (for example, a teaspoon), small carb amounts can be rounded down on nutrition panels but still add up when you spread two tablespoons on toast or pancakes.

Pomona’s Pectin avoids this problem by using calcium to set instead of relying on sugar or dextrose. The calcium packet is included with the pectin, and though the product costs more up front, it makes multiple batches, so it’s economical if you plan to make sugar-free jams frequently.

What sweeteners work best in this recipe?

We tested a variety of sweeteners to find which produced the best texture and flavor:

• Allulose: The top pick. It yields a sticky, glossy jam with the familiar jam flavor and texture—my favorite result.
• Bocca Sweet: Also worked very well and produced a pleasing texture and taste.
• Erythritol: Tends to become grainy when cold, so it didn’t perform well for a freezer jam that will be frozen and thawed repeatedly.
• Stevia: Not recommended—the aftertaste becomes noticeable once the jam is defrosted.
• Monk fruit: Works if it’s 100% monk fruit (avoid blends with erythritol). It can produce a slightly drier, firmer gel compared with allulose or Bocca Sweet.

Quick steps to make low-carb blueberry freezer jam

• Clean the fruit: Remove stems, leaves, and any debris.
• Mash the berries: Mash to your preferred texture. A potato masher works well; for a smoother texture, pulse part of the mash with a stick blender.
• Add sweetener: Stir your chosen sweetener into the mashed berries and set aside.
• Make the pectin water: Boil 3/4 cup water, pour it into a blender or tall vessel, add Pomona’s pectin, and blend for about one minute until fully dissolved. Vent the blender while blending.
• Combine: Pour the pectin water into the berry mixture and mix thoroughly.
• Add calcium water: Add the calcium solution that comes with the pectin. The jam will begin to thicken immediately.
• Jar and freeze: Spoon jam into freezer-safe jars, leaving about 1/2 inch headspace to allow for expansion. Freeze.

Storage and Serving Suggestions

Store the freezer jam for up to 6 months. Thaw jars in the refrigerator overnight; once thawed, the jam will keep in the fridge for about two weeks. This jam is excellent on low-carb bagels, smeared on keto pancakes, or spooned over low-carb ice cream. Because you can freeze in small jars, you can avoid waste by thawing only what you need.

Looking For More Low Carb and Keto Jams?

If you enjoy this recipe, there are many other low-carb, sugar-free jam and sauce recipes available for different fruits and techniques—both freezer and shelf-stable methods.

Keto Blueberry Freezer Jam With The Perfect Texture

A quick and easy keto blueberry freezer jam you can make in about 30 minutes and enjoy long after the summer berry fest is over.

Ingredients

• 4 cups fresh or frozen blueberries (fresh in season is best)
• 3/4 cup water
• 3/4 cup allulose
• 3 tsp Pomona’s 100% pectin
• 4 tsp calcium water (included with pectin)

Instructions

1. Clean and wash the blueberries, removing stems and debris.
2. Add berries to a large bowl and mash with a potato masher.
3. Stir in the sweetener and set aside.
4. Boil 3/4 cup water, pour into a blender, add the pectin, and blend for 1 minute while venting the blender.
5. Pour the pectin water into the blueberries and stir to combine.
6. Add the calcium water; the jam will begin to thicken immediately.
7. Transfer to freezer-safe jars, leaving 1/2 inch headspace to prevent cracking.
8. After about 12 hours in the refrigerator the jam will reach a perfect texture; frozen jars will keep up to six months.

Notes

Allulose and Bocca Sweet produce the best texture and flavor in this recipe.

Nutrition Information:

Serving Size: 1 Tbsp

Amount Per Serving:
Calories: 5
Carbohydrates: 1g
Net Carbohydrates: 1g

Nutritional information is approximate. Sugar alcohols like erythritol are often excluded from net-carb counts because they have minimal impact on blood sugar; net carbs are total carbs minus fiber.