Undetectably healthy blueberry crumble bars that are easy to make and even easier to eat! Made with fresh blueberries and entirely vegan and gluten free, these simple blueberry bars will be your favorite healthy summer dessert!

stack of blueberry pie bars

This recipe is in collaboration with Yogi Tea! We hope you love the recipe! Thank you for supporting brands that help make The Banana Diaries possible!

sliced blueberry crumble bars with knife

In need of an undetectably healthy vegan dessert recipe to bring to your summer party this year? Look no further. These healthy blueberry crumble bars taste like warm blueberry pie in bar form and yet are securely low in sugar, Paleo, vegan, gluten-free, dairy-free, egg-free, and filled with antioxidants!

Plus these bars are made with 6 of the simplest plant-based ingredients. In fact, you probably have most, if not all, in your cabinet and fridge right now!

sliced blueberry crumble bars

Making the perfect blueberry pie filling

Much like my Paleo vegan blueberry pie, you want a gooey and delicious blueberry pie filling that’s perfectly sticky and sweet yet holds its shape when sliced.

In order to do this, you’ll need arrowroot powder: a powder that acts much like cornstarch, yet is entirely Paleo. While this blueberry bar recipe isn’t entirely grain-free, it is corn-free. If you’re okay with using cornstarch, you can absolutely use that instead, but you definitely need some sort of thickening agent like arrowroot powder.

blueberry pie filling

For the remaining blueberry filling ingredients, you’ll need:

stacked vegan blueberry bars with yogi tea box in background

The next tip is to actually cook the blueberries prior to making the bars. This part differs from making a blueberry pie, but in order to achieve that classic blueberry pie filling in bar form, you’ll need to cook the berries and thicken it with arrowroot powder while cooking.

sliced blueberry crumble bars

This is where we’ll add in the tea as well. I used Yogi Green Tea Blueberry Slim Life tea to not only enhance the the blueberry flavor without adding sugar, but also to include some antioxidants from the green tea.

Now, if you’re concerned about having caffeine in your dessert (I get it, no one wants to stay up late after enjoying one of these late at night!), one cup of green tea contains about 25-29 mg of caffeine, which, spread over the amount of 16 bars, that works out to less than 1 mg of caffeine per bar.

bitten blueberry pie bar

However, if you are caffeine free, you can certainly swap in another tea from Yogi Tea, such as their Yogi Sweet Clementine Stress Support tea or their Yogi Mango Ginger tea. I’ve personally tried both of these teas, and the flavor would absolutely complement the fresh blueberry taste.

You’ll let the tea steep in the blueberry mixture for a few minutes, then remove the tea bag and keep the heat on simmer while the blueberries thicken as you make the crumble bar base and topping.

How to make vegan blueberry crumble bars

Now that we’ve gone over the filling, let’s make the rest of these bars!

For the crumble base and the topping, you’ll need:

  • Cassava flour
  • Oats
  • Maple syrup
  • Water
  • Coconut oil
  • Vanilla extract
baked healthy blueberry crumble bars with yogi tea box

These blueberry crumble bars are really simple in ingredients, and don’t require any dairy nor eggs. Yet, you still get a flaky and delicious pie crust bottom layered with gooey blueberries and a deliciously oaty crumble!

If you don’t have cassava flour, or would prefer a different flour, you can use gluten free 1-to-1 baking flour or oat flour. Keep in mind that if you choose just oat flour, the crust will be more shortbread cookie-like than a pie crust. Still delicious, just a different texture!

The rest of the recipe is fairly simple. All you’ll need to do:

  1. Prepare and blind bake the base layer by cutting the coconut oil into the flour and mixing in the maple syrup, water, and vanilla. Press the dough into the pan and chill before par-baking the crust. Once you blind bake the crust, you’ll set that aside and prepare the crumble!
  2. To prepare the crumble, simply mix together the oats and cassava flour, then stir in the melted coconut oil, maple syrup, and vanilla extract.
baked pie crust in pan

Then we’ll put all of the layers of these vegan blueberry crumble bars together! Start by pouring the blueberry filling on top of the crumble base then sprinkling tablespoon-sized dollops of the crumble on top.

Bake the crumble bars and then let them rest and cool for 30-45 minutes. This ensures that the blueberry filling properly thickens, and you’ll be able to slice into them without creating a massive mess.

Serve warm or cool, and preferably with a big scoop of cashew milk ice cream!

How to store blueberry crumble bars

I recommend storing these blueberry bars covered at room temperature for up to 3 days. However, you can also store them sliced in an airtight container for up to a week in the fridge, or in the freezer for up to 2 months.

stacked blueberry crumble bars

Can you freeze blueberry pie bars?

Yes, absolutely! You can even eat them frozen, but I prefer my blueberry crumble bars warm. To reheat them, simply preheat the oven to 350F, and place a bar (or two 😉 ) onto a piece of tin foil.

Bake the bars for 5-7 minutes and then serve!

sliced blueberry pie bar

Can I make these with other berries?

Of course! Personally, my favorite berry to bake healthy desserts with is blueberry, but these healthy blueberry crumble bars can also be made with raspberries, strawberries, blackberries, or a mix of everything.

stacked vegan blueberry bars

You can still use the same flavor of Yogi Tea, or you can match the flavor to your desired fruit filling, such as Yogi Raspberry Passion Perfect Energy tea, Yogi Blackberry Apple Cider Digestive Awakening tea, or Yogi Berry Detox tea.

Simply swap in the same amount of desired berry for the blueberries and make these healthy blueberry crumble bars into any berry crumble bars!

sliced blueberry crumble bars

I hope you love these blueberry crumble bars as much as I do! I still cannot get over how gooey and delicious the blueberry filling is- like a vegan blueberry pie in miniature bar form!

sliced blueberry bars

If you make this recipe, let me know how it goes down below in the comments section. As always, I love to see your beautiful creations on Instagram and Pinterest, so be sure to tag both The Banana Diaries and Yogi Tea!

Happy crumble bar baking!

bitten blueberry pie bar

More healthy blueberry desserts

Vegan Blueberry Cobbler

Healthy Blueberry Oatmeal Muffins

Vegan Blueberry Lemon Cake

Paleo Lemon Bars with Blueberry Compote

Blueberry Overnight Oats

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stacked blueberry crumble bars

Healthy Blueberry Crumble Bars (Vegan)

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  • Author: thebananadiaries
  • Prep Time: 20
  • Cook Time: 33
  • Total Time: 53 minutes
  • Yield: 16 1x
  • Category: Dessert
  • Method: Baking
  • Cuisine: American
  • Diet: Vegan


Undetectably healthy blueberry crumble bars that are easy to make and even easier to eat! Made with fresh blueberries and entirely vegan and gluten free, these simple blueberry bars will be your favorite healthy summer dessert!



Blueberry Crumble Bar Base:

  • 1 1/2 cups cassava flour
  • 1/2 cup coconut oil, softened
  • 1/3 cup chilled water
  • 1/3 cup maple syrup
  • 1 tsp vanilla extract

Blueberry Filling:

Crumble Topping:

  • 1 cup sprouted GF oats
  • 1/2 cup cassava flour
  • 1/2 cup coconut oil, melted
  • 1/3 cup maple syrup
  • 1 tsp vanilla extract


  1. To start, prepare the blueberry filling by bringing the blueberries and water to a boil in a large pot on the stove.
  2. Keep the water boiling, and sift in the arrowroot powder. Stir with a whisk to combine the arrowroot powder into the mixture, and reduce the heat to a simmer. Add the Yogi Tea Blueberry Slim Life tea bag to the pot and allow the mixture to steep with the tea for 5 minutes.
  3. Remove the tea bag and keep the pot on simmer while you prepare the base.
  4. Preheat the oven to 425F and line an 8×8 baking tray with parchment paper.
  5. In a large bowl, cut the softened coconut oil into the cassava flour with either a fork or a pastry cutter. Do this until the texture is crumbly like sand. Add in the chilled water, maple syrup, and vanilla extract, and combine the ingredients until it resembles a thick dough.
  6. Press the dough into the base of the pan, spreading it out to touch the edges of the baking pan. Poke a few holes into the dough and place the pan into the fridge to chill for 10 minutes.
  7. Once chilled, remove the pan from the fridge and place into the oven to bake for 12-13 minutes, or until the crust is lightly golden.
  8. Remove from the oven and allow to cool. Reduce the oven heat to 375F. At this point, you can remove the blueberry filling from the stove top as well, and take a fork to mash the berries all together. Set both the base and the filling aside as you prepare the crumble.
  9. In a large bowl, whisk together the cassava flour and oats. Then add in the coconut oil, maple syrup, and vanilla extract, and combine into a sticky batter.
  10. Now assemble the blueberry crumble bars. Pour the blueberry filling on top of the cooled crust, then drop dollops of oat crumble on top of the blueberry filling.
  11. Place into the oven to bake for 27-32, or until the oats have lightly browned to a golden color. Remove from the oven and allow the bars to set for 30 minutes.
  12. Slice and serve warm.


Coconut oil swap: if you do not want to use coconut oil, vegan butter is also a wonderful substitute here.


  • Serving Size: 1 bar
  • Calories: 246
  • Sugar: 10.3 g
  • Sodium: 6.6 mg
  • Fat: 13.9 g
  • Saturated Fat: 11.3 g
  • Carbohydrates: 27 g
  • Fiber: 1.5 g
  • Protein: 1.4 g
  • Cholesterol: 1.6 mg
pinterest image for blueberry crumble bars
pinterest image for blueberry crumble bars