This easy no-pectin slow cooker blueberry jam recipe gets a subtle, earthy twist from a few fresh thyme sprigs alongside blueberries, lemon juice, sugar, and a pinch of kosher salt.

To make blueberry jam in your slow cooker or crockpot, just toss all the ingredients in, set it on low, and let it cook for 6 hours. After cooking, blend for smoothness and cook uncovered for another 1-3 hours to thicken.

This is a perfect way to use those fresh summer blueberries! Honestly, it’s so good it should be illegal. Drop a comment below if you try it—would love to hear your “jam” stories!

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Can I Double This Recipe in My Slow Cooker?

Yes, you can double the Blueberry Jam recipe if your slow cooker has the capacity. Keep the cooking time the same at 6 hours on low for the initial cook and adjust the thickening time as needed.

Ensure to stir more frequently to prevent sticking and promote even cooking. No changes in the ingredient proportions are needed—just double each one exactly.

Slow Cooker Blueberry Jam Ingredients

• 1 pound of fresh blueberries (about 4 cups, or 454 grams)
• 1 tbsp of lemon juice
• 6 sprigs of fresh thyme
• ⅔ cup of sugar (about 133 grams)
• A pinch of kosher salt

How To Make Slow Cooker Blueberry Jam

1. Cook the Blueberries: Combine blueberries, lemon juice, thyme sprigs, sugar, and a pinch of salt in your slow cooker. Secure the lid and set it to cook on low for 6 hours. The berries should become tender and form a deep purple syrup.
2. Cool and Prep: Turn off the slow cooker and let the mixture cool for about 10-15 minutes. Using kitchen tongs, carefully remove and discard the thyme sprigs.
3. Blend for a Smoother Consistency: With an immersion blender, pulse the berry mixture a few times to achieve a smooth jam consistency. Be cautious when blending to avoid splashes; tilt the cooker if needed to submerge the blender completely.
4. Thicken the Jam: Switch the slow cooker back to low and cook uncovered for an additional 1-3 hours. The jam will thicken but might still appear slightly runny—it will set further as it cools.
5. Storage: Serve your jam warm, or allow it to cool completely before transferring it to an airtight container. It can be refrigerated for up to a week or frozen for up to 6 months.

Can I Use Frozen Blueberries for This Blueberry Jam Recipe?

Absolutely, you can use frozen blueberries if fresh ones aren’t available. Just remember, there’s no need to thaw them first. Chuck them straight into the slow cooker and they’ll do just fine, giving you that vibrant, jammy goodness.

Recipe Tips

• Sweetness Adjustment: If you find the jam too tart after the initial cooking, don’t hesitate to stir in a bit more sugar; a tablespoon or two should do the trick, and then let it meld during the thickening phase.
• Skimming the Foam: As your blueberry jam cooks, you might notice some foam on top; skimming it off with a spoon will make your jam clearer and more attractive, just like professional jams!
• Stir Occasionally: Keep things from getting too sticky by giving your jam a gentle stir every hour; it prevents burning and ensures even flavor throughout your jam.
• Testing for Doneness: Not sure if your jam is ready? Place a small spoonful on a chilled plate, and if it wrinkles when pushed with a finger, it’s set to perfection.

Recipe Variations

• Citrus Twist: Add the zest of one orange or lemon to the pot before cooking; it infuses the jam with a zesty aroma that compliments the blueberries beautifully, brightening up your breakfast table.
• Spice It Up: For a warming twist, throw in a cinnamon stick or a few cloves during the cooking process; this makes your blueberry jam feel like a hug in a jar during the cold months.
• Berry Bonanza: Mix it up by adding other berries such as raspberries or blackberries for a multi-berry jam; half and half with blueberries creates a delightful melody of flavors.
• Vanilla Dream: Stir in a teaspoon of vanilla extract after you turn off the heat; this adds a smooth, rich undertone that makes your blueberry jam taste like gourmet luxury.

What To Serve With Blueberry Jam

Serve your Blueberry Jam with freshly baked scones, artisanal whole grain toast, Greek yogurt parfaits, oatmeal pancakes, and vanilla bean ice cream.

You can also pair it with herbed goat cheese, and dark chocolate desserts to elevate your breakfast or dessert game.

How To Store Leftover Blueberry Jam

In The Fridge:

For optimal freshness, store your blueberry jam in an airtight container. Ensure the lid is tightly sealed to maintain flavor and texture. Refrigerate promptly and use within one week for best results, keeping the jam cool and away from direct light.

In The Freezer:

Blueberry jam can be stored in the freezer to extend its shelf life. Transfer the jam to a freezer-safe container or jar, leaving about half an inch of space at the top for expansion. This will keep the jam fresh for up to 6 months, ensuring you have a delicious jam year-round.

Check out More Slow Cooker Recipes:

• Slow Cooker Pear Jam
• Blackberry Jam in Slow Cooker
• Apricot Jam in Slow Cooker