Healthy Blueberry Crumble Bars [gluten-free + no added sugar]

These healthy blueberry crumble bars are made with almond flour, oat flour, sugar-free sweetener, and juicy blueberries with sugar-free blueberry jam. Easy, delicious, and perfect for a healthier dessert.

If you’re looking for a healthier blueberry dessert that doesn’t taste “healthy,” you’ve come to the right place.

These Healthy Blueberry Crumble Bars have everything you want in a summer treat: a buttery crumb topping, a jammy blueberry filling, and just the right amount of sweetness. The best part? They’re made with almond flour, oat flour, sugar-free sweetener, and less butter than traditional blueberry bars.

Think of them as the love child of a blueberry pie and a crumb cake, only lighter, higher in fiber, and much easier to make.

Why You’ll Love These Healthy Blueberry Crumble Bars

There are plenty of blueberry bar recipes out there, but this version stands out for a few reasons:

• Made with almond flour and oat flour
• No refined sugar
• Lower in carbs than traditional blueberry bars
• Higher in fiber
• Less butter than classic crumble bars
• Packed with juicy blueberries
• Includes sugar-free blueberry jam for extra flavor
• Easy enough for beginner bakers

Whether you’re looking for a healthier dessert, an afternoon snack, or a meal-prep treat, these bars check all the boxes.

The Secret to a Better Blueberry Filling

Fresh blueberries are amazing on their own, but adding a little sugar-free blueberry jam takes the filling to another level.

As the bars bake, the jam melts into the berries and creates a thick, rich filling that tastes like homemade blueberry pie. It also helps prevent the filling from becoming watery, giving you clean slices that hold together beautifully.

The result is a sweet, vibrant blueberry layer packed with real fruit flavor.

Healthy Blueberry Crumble Bars Recipe

Ingredients

Crust & Crumble Topping

• 1 ½ cups almond flour
• 1 ½ cups oat flour
• ½ cup NuNaturals granulated monk fruit sweetener (code healthyhelper saves!)
• 1 teaspoon baking powder
• ¼ teaspoon salt
• 1 large egg
• 1 ½ teaspoons vanilla extract
• ½ cup unsalted butter, cold and cubed
• Optional: 2 tablespoons oat fiber for extra fiber and structure

Blueberry Filling

• 4 cups fresh blueberries
• ⅓ cup Good Good sugar-free blueberry jam (code healthyhelper saves!)
• 1 tablespoon cornstarch
• 1 ½ tablespoons lemon juice
• Zest of 1 lemon (optional)
• 2 tablespoons monk fruit sweetener or allulose (optional)

Instructions

1. Preheat oven to 350°F (175°C). Line a 9×13-inch baking dish with parchment paper.
2. In a large bowl, whisk together almond flour, oat flour, sweetener, baking powder, salt, and oat fiber if using.
3. In a small bowl, whisk together egg and vanilla.
4. Add the egg mixture and cold butter cubes to the dry ingredients. Use a pastry cutter, fork, or your fingers to work everything together until a crumbly dough forms.
5. Press about two-thirds of the mixture firmly into the bottom of the prepared baking dish.
6. In another bowl, combine blueberries, sugar-free blueberry jam, cornstarch, lemon juice, lemon zest, and optional sweetener. Toss until evenly coated.
7. Spread the blueberry mixture evenly over the crust.
8. Sprinkle the remaining crumble mixture over the top.
9. Bake for 35-40 minutes, or until the topping is lightly golden and the filling is bubbling around the edges.
10. Cool completely before slicing. Refrigerate for at least 1 hour for the cleanest cuts.

Print

Tips for the Best Blueberry Crumble Bars

Use Fresh Blueberries When Possible: Fresh berries provide the best texture and help prevent excess moisture in the filling.

Don’t Skip the Lemon Juice: The lemon brightens the blueberries and balances the sweetness beautifully.

Chill Before Cutting: The filling continues to set as the bars cool. Chilling makes them easier to slice and serve.

Add Extra Protein: Want to make these bars even more satisfying?

Replace ½ cup of the oat flour with:

• ¼ cup vanilla protein powder
• ¼ cup additional oat flour

This creates a higher-protein version that’s perfect for breakfast or snacking.

Frequently Asked Questions

Can I Use Frozen Blueberries?

Yes. If using frozen blueberries, do not thaw them first. You may need to add an extra teaspoon of cornstarch to absorb additional moisture.

Are These Blueberry Bars Gluten-Free?

They can be. Simply use certified gluten-free oat flour.

What Is the Best Sugar-Free Sweetener?

Monk fruit sweetener and allulose both work well. Allulose creates a softer texture, while monk fruit provides a sweetness closer to traditional sugar.

How Should I Store Them?

Store in an airtight container in the refrigerator for up to 5 days.

They can also be frozen for up to 3 months.

Final Thoughts

These Healthy Blueberry Crumble Bars prove that you don’t need loads of sugar or butter to create a dessert that feels indulgent.

With juicy blueberries, sugar-free blueberry jam, a tender almond-oat crumble, and plenty of fresh berry flavor, they’re perfect for summer gatherings, meal prep, or satisfying a sweet tooth without the sugar crash.

One bite and you’ll forget they’re the healthier version.

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