Homemade Blueberry Jam (sugar-free, keto)
This homemade sugar-free blueberry jam is bursting with blueberry flavor and is ready in just 30 minutes.
Made with only 3 simple ingredients, this jam is naturally sweetened and thickened without any added sugar and pectin.
Add this delicious jam to your favorite keto recipes: pancakes, crepes, waffles, yogurt, ice cream, or any other desserts for a delicious and healthy touch!
Skip the store-bought jam loaded with artificial flavors and sugar and make your own healthy blueberry jam!
The recipe requires:
3 Ingredients
Active cooking time: 15 minutes
Total cooking time: 30 minutes
Table of Contents
Why you will love this!
Homemade jam bursting with blueberry flavor.
Just wholesome ingredients: Skip the additives and artificial flavors.
No added sugars or pectin: This jam is naturally sweetened and thickens without extra ingredients.
Frozen or fresh berries: Use whichever you prefer.
Simple recipe: Ready in just 30 minutes and 3 ingredients!
Perfect Low-Carb Sauce and Healthy Jam: Drizzle it over all your favorite dishes.
Blueberries: health benefits
Forget sugary fruits and hidden carbs! When it comes to the keto diet, blueberries stand out as a true friend. These tiny powerhouses are packed with benefits that perfectly complement your low-carb lifestyle.
Here’s why blueberries deserve a permanent spot in your keto pantry:
- Low-Carb & High-Fiber: Unlike many fruits, blueberries are naturally low in carbs and high in fiber. This fiber helps you feel fuller for longer, keeping those cravings at bay.
- Stable Blood Sugar Levels (Diabetic-Friendly): Blueberries have a low glycemic index, meaning they have minimal impact on your blood sugar levels. This makes them a safe and satisfying occasional treat for diabetics, allowing you to enjoy some sweetness without spiking your glucose.
- Antioxidant Powerhouse: Blueberries are packed with antioxidants called anthocyanins. These antioxidants fight free radicals, potentially reducing inflammation and protecting against chronic diseases – a win-win for overall health.
Low Sugar Blueberry Jam Recipe
Ingredients
To make a small batch of blueberry jam, you’ll need 3 main ingredients:
Blueberries: Fresh or frozen, both work perfectly! Choose what’s most convenient and available at your grocery store.
Sweetener: Pick your favorite sweetener like erythritol (my go-to!), allulose, or monk fruit if you are on a ketogenic diet. Alternatively, use natural sweetener like maple syrup, honey, or coconut sugar if you don’t restrict your carb intake.
Lemon Juice /Lime Juice: Freshly squeezed lemon adds a bright zing and balances the sweetness of the jam.
Optional add-ins:
- Lemon Zest: Enhances the flavor with a delightful citrusy touch and adds a textural contrast.
- Cinnamon: A warm and comforting spice that complements the blueberries beautifully.
- Cardamom: A touch of cardamom adds a unique and aromatic depth to the sauce.
- Vanilla extract: Adds wonderful vanilla flavor.
*you’ll find the exact measurements in the recipe card below.
Equipment
- Wide and shallow saucepan: helps to evaporate blueberry juices quicker and expedite the process.
- Wooden spatula
- Rubber spatula
- Potato masher (optional) to mash the berries
- Immersion blender/food processor (optional)
- Mason Jar or an airtight container
Instructions
Step 1: Prepare the blueberries
Wash the blueberries thoroughly and remove any stems or damaged berries.
Step 2: Combine ingredients
In a saucepan, combine the washed fresh blueberries, sweetener of your choice, lemon juice, and lemon zest.
Step 3: Cook the jam
Turn on medium heat and begin stirring the mixture. Bring it to a full rolling boil, then reduce the heat to low.
As the mixture simmers, it will foam up and gradually reduce in volume. Keep stirring occasionally to prevent burning and sticking. Once the foaming settles, start stirring more frequently to ensure even cooking. The jam will darken in color and thicken to a syrupy consistency.
For a smoother jam, you can mash the berries with a potato masher while they’re cooking. Alternatively, blend the jam after it reaches the desired consistency for a completely smooth texture.
To check if the jam is ready – dip a clean spoon into the jam and coat the back. If the jam runs freely, it needs more time. When the jam coats the spoon and you can draw a line down the center that holds its shape for a moment, it’s done.
When the jam is ready?
When to Stop Cooking Your Jam:
There are two main ways to determine when your jam is ready:
- Spoon Test: Dip a clean spoon into the hot jam and coat the back. If the jam runs freely, it needs more time. When the jam coats the spoon and you can draw a line down the center that holds its shape for a moment, it’s done.
- Temperature Check: (Optional) For precise measurement, use a candy thermometer. Jams typically reach setting consistency between 220°F (104°C) and 225°F (107°C).
Cooking Tips:
- Overcooking can lead to a tough or rubbery jam. Be mindful of the cooking time and remove the jam from heat as soon as it reaches the desired consistency.
- Letting the jam cool slightly before testing it with the spoon test can provide a more accurate representation of the final texture.
- For a thicker jam, you can add a pinch or two of xanthan gum according to the package instructions.
Blueberry jam vs jelly vs sauce
Here’s a breakdown of the difference between jam, sauce, and jelly:
- Jam: This is a spread made from crushed or whole fruit until it reaches a thick, spreadable consistency. It typically contains visible pieces of fruit.
- Sauce: This is a looser, more liquidy fruit preparation than jam. It can be made with or without added thickeners and may be smooth or contain some fruit chunks. Sauces are often used as toppings for desserts or drizzled over meats.
- Jelly: This is the clearest and smoothest of the three. It’s made from fruit juice (excluding the pulp) and has a gelatinous texture.
How to use blueberry jam?
Here are some of my favorite ways to use blueberry jam:
- Swirl it into yogurt or chia pudding
- Layer in the parfait or trifle
- Add to whipped cottage cheese
- Top baked cottage cheese breakfast “zapekanka”
- Add jam to your cheese board
- Spread on keto crepes, a slice of crusty low carb bread, or waffles
- Add to an Ice Cream or Blueberry Pie filling.
More sugar-free jam recipes
Discover other flavors with these delicious homemade jam recipes:
FAQ
How to store keto blueberry jam?
Store blueberry jam in a clean jar or an airtight container for a 2-3 weeks in a fridge.
Blueberry Jam: nutritional information
Servings: 350 g (1.4 cup/about 17 tablespoons)
Total carbohydrate 3.6 g
Dietary fiber 0.8 g
Total sugars 2.5 g
Net carbs 2.8 g
Total fat 0.2 g
Saturated fat 0 g
Cholesterol 0 mg
Potassium 18 mg
Disclaimer: The nutritional value provided is based on general information and should not be considered as a substitute for professional dietary advice or medical guidance. The values are derived from reputable sources, such as food databases or nutritional labels, but there may be variations in nutrient content depending on factors such as brand, preparation methods, and serving sizes.
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Sugar-Free Blueberry Jam
Homemade Keto Blueberry Jam: 3-ingredient sugar-free jam ready in 30 minutes and naturally thickened. Enjoy it on waffles, crepes, yogurt, ice cream & more!
Ingredients
- 500 g (17 oz./3 cups) blueberries (fresh or frozen)
- 2-4 tbsp. erythritol, regulate by taste
- 1-2 tbsp. freshly squeezed lemon juice (1/2 lemon)
- Lemon zest of one lemon
Instructions
- Wash the blueberries thoroughly and remove any stems or damaged berries.
- In a saucepan, combine the washed blueberries, erythritol, lemon juice, and lemon zest. Turn on medium heat and begin stirring the mixture. Bring it to a boil, then reduce the heat to low.
- As the mixture simmers, it will foam up and gradually reduce in volume. Keep stirring occasionally to prevent burning and sticking. Once the foaming settles, start stirring more frequently to ensure even cooking. The jam will darken in color and thicken to a syrupy consistency.
- To check if the jam is ready - dip a clean spoon into the jam and coat the back. If the jam runs freely, it needs more time. When the jam coats the spoon and you can draw a line down the center that holds its shape for a moment, it's done.
TIP: For a smoother jam, you can mash the berries with a potato masher while they're cooking. Alternatively, blend the jam after it reaches the desired consistency for a completely smooth texture.