This thick, glossy keto blueberry jam has just four ingredients and comes together in under 25 minutes! It’s perfect for spreading on keto toast, swirling into Greek yogurt, or layering in low-carb desserts.
Under 3 grams of net carbs per serving, this sweet treat fits nicely into a low-carb plan.

Since starting intermittent fasting, I have stopped having much breakfast. But this jam is a nice treat for those days when I felt like a treat that reminded me of childhood comfort food. Just a dollop of this jam on a hot keto toast with a blob of butter, and all is right with my world!

Recipe Highlights
- Under 3 grams of net carbs per serve
- Frozen blueberries work too – make this jam in any season.
- Keto-friendly & Sugar-Free – Sweetened with your favorite keto-friendly sweetener.
- Only 4 Ingredients – No pectin or preservatives needed.

INGREDIENT LIST
- Blueberries (fresh or frozen) – I have used frozen
Keto sweetener – erythritol, allulose, monk fruit, xylitol – you only need 1/4 cup as the blueberries taste sweeter after being cooked.
Allulose gives the smoothest texture, but any 1:1 sweetener works.
Chia seeds – Help thicken the jam naturally and add fiber. If you want to skip these, cook the jam until you are happy with the thickness.
Lemon juice – Balances the sweetness and enhances the berry flavor.

Step by Step to make Keto Blueberry Jam


The jam is very easy to make.
Add Ingredients to Pan: In a small saucepan, combine blueberries, sweetener, and lemon juice.
Cook Down: Heat over medium, stirring frequently, until the blueberries burst and the mixture thickens (about 8–10 minutes).
Mash: Use a fork or potato masher to break down the berries to your desired consistency.
Add Chia Seeds: Stir in chia seeds and cook for 2–3 more minutes. It will thicken as it cools.
Variations Of This Recipe
Substitute blueberries with strawberries for a beautifully balanced sweet and tart strawberry jam.
Some Useful Tips
Use a clean, dry glass jar with an air-tight lid and store this jam in the fridge for up to 2 weeks.

Frequently Asked Questions About KEYWORD
Yes! No need to thaw them—just cook a little longer.
Yes, but it won’t thicken the same way. You can simmer longer or add a pinch of xanthan gum instead.
This is a refrigerator jam, not shelf-stable. For long-term storage, freeze it in portions.
In The Fridge: 2 weeks
In The Freezer: In single portions for 2 months
Hungry for More

Equipment
- 1 Skillet
- 1 Fork or Masher
- 1 Clean jar for storing jam
Ingredients
- 2 cups Blueberries fresh or frozen
- 1/4 cup Erythritol
- 2 Tablespoons Lemon Juice
- 1 Tablespoon Chia Seeds See notes
Instructions
- Add blueberries, sweetener, and lemon juice to a small saucepan.
- Simmer over medium heat for 8–10 minutes, stirring and mashing the berries.
- Stir in chia seeds and cook for 2–3 minutes more.
- Remove from heat and let cool. It will continue to thicken.
- Store in a sealed jar in the fridge for up to 2 weeks.
Notes
Nutrition
Disclaimer
Nutrition facts are estimates. Always check with your healthcare provider before making dietary changes.
Disclaimer:
Nutritional Panel: Our nutritional values are calculated by Spooncular API. While we try to ensure these values are correct, please confirm these independently.
All information on our website is for general information only. Please seek advice from medical professionals to check if a diet, particular food, allergens, or a way of eating is suitable for you.
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