Blueberry Crumble Bars

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Blueberry Crumble Bars have an incredible blueberry filling, which is sandwiched between thick layers of crisp, buttery oatmeal crumble crust & topping.


Blueberry Crumble Bars

Hi friends! This is Kristie from The Sweet & Simple Kitchen, here again & so excited to be sharing another recipe with you!

First things first – I’m not sure if you guys already know this, but just in case you didn’t, I thought I would tell you something pretty awesome; It’s officially Friday! YAY!!!

So in honour of this glorious day, what say you and I celebrate by baking up some deliciousness, in the form of these Blueberry Crumble Bars, which we can then spend our weekends devouring that is if it lasts you the whole weekend, (psst… they won’t in my house,) sound good? Alright then, let’s do this!


Confession: I’ve been making this recipe for years, and just realized this week that I somehow neglected to share it on my blog! In my opinion, this is basically just a straight up crime, because these bars are just too dang good to be missed.

They have the most incredible blueberry filling, which is sandwiched between thick layers of crisp, buttery oatmeal crumble crust & topping… I’m seriously starting to drool just thinking about them. Subtle hints of lemon zest & cinnamon are what make the flavour of these bars extra amazing.


Truth be told, the real reason I love these bars so much (I mean apart from how stinkin’ delicious they are), is that they totally rock as a yummy snack & while simultaneously doubling as a killer dessert. That’s right, these bars are so much more than just another pretty face my friends 😉

Not only are they super portable for wrapping up as a quick and easy on-the-go breaky or snack; but also, if you eat them warm from the oven, with a scoop of vanilla ice cream or a dollop of whipped cream atop of the crisp oatmeal crumble, & gooey blueberry filling……….. I don’t think I need to explain any further why that’s just amazing.


Suffice to say, these Blueberry Crumble Bars pretty much become a main food group in my house once blueberry season strikes. Like as in, I bake a tray at least once a week, which we then proceed to eat for breakfast, snacks and dessert until all that’s left is an empty pan with a few stray crumbs… HA! I’m just kidding! We, of course, don’t leave any crumbs behind, because that would just be craziness.


So yeah, I think you understand where I’m going with this. We are kinda, sorta addicted to these blueberry bars, and I promise once you give the recipe a try, you will be too! Don’t say I didn’t warn you…

So here it is lovelies & I hope you enjoy!


Blueberry Crumble Bars

5 from 8 votes
Blueberry Crumble Bars have an incredible blueberry filling, which is sandwiched between thick layers of crisp, buttery oatmeal crumble crust & topping.
Servings 9 servings
Prep Time 20 minutes
Cook Time 45 minutes
Total Time 1 hour 5 minutes

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Blueberry Filling

Crumb Crust & Topping



  • In a medium sauce pan over medium-high heat, mix together blueberries, sugar, and lemon juice to a boil. Reduce heat to a simmer and allow the berries to cook down until tender - this should take about 10 minutes.
  • Mix your cornstarch with 2 tbsp of cold water and add to the blueberries, stirring constantly until thickened about another 1-2 minutes.
  • Remove saucepan from heat, and pour into a heat proof bowl. Place plastic wrap directly on the surface of the filling and refrigerate until completely cool, about one hour.

Crumb Crust & Topping

  • Meanwhile, prepare your crumb crust and topping. Line a 8 inch square baking pan with parchment paper and preheat your oven to 350 degrees.
  • In a large mixing bowl mix together oats, brown sugar, flour, cinnamon, nutmeg, and lemon zest. Using a pastry cutter, cut in butter until mixture is crumbly and you have pea sized bits of butter. Set aside in a cool place or in the refrigerator until your filling has cooled and you are ready to assemble your bars.
  • Once your filling has cooled, press about ½ of the crumb mixture evenly into the bottom of your pan using your hands and being sure that you press into all four corners.
  • Next, spread the blueberry filling evenly over top of your crust. Finally, top the blueberry filling with the remaining crumb for your topping, evenly coating the blueberry filling.
  • Bake for 40-45 minutes or until the crumb topping is a nice golden brown colour and the blueberry filling is bubbling around the outer edges.
  • Remove from the oven and allow to cool completely in the pan, before cutting into squares. Or You could serve it warm with a scoop of ice cream… DO IT!
  • Once cooled, use the parchment paper to life the blueberry bars from the pan and place on top of a cutting board. Cut your blueberry bars evenly to the size you want; I usually cut them into 9 or 16 equal squares.


Calories: 509kcal | Carbohydrates: 74g | Protein: 5g | Fat: 22g | Saturated Fat: 13g | Cholesterol: 54mg | Sodium: 257mg | Potassium: 206mg | Fiber: 4g | Sugar: 41g | Vitamin A: 660IU | Vitamin C: 8.7mg | Calcium: 54mg | Iron: 2.2mg
Course Dessert, Fruit
Cuisine American
Calories 509

About JulieJulie Clark

About Julie Clark

I'm Julie Clark, CEO and recipe developer of Tastes of Lizzy T. With my B.A. in Education and over 30 years of cooking and baking, I want to teach YOU the best of our family recipes.

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5 from 8 votes (8 ratings without comment)
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7 years ago

Can this recipe be doubled?

7 years ago

Hi, can frozen blueberries be used?
The fresh ones are bigger than I prefer., thanks

7 years ago

These look so good! I’m excited to try this recipe but I’m curious how big of a pan did you use, and is a glass dish OK to use? Also it would be nice to know how long cook time and total prep time. Thank you!

7 years ago

OMG… that looks so delicious!!!
The first close up image is so great that I almost grab after it hoping that I could get it out of the screen…
I will try it next week, but I will probably use frozen blueberries instead of fresh as I still have some of my own blueberries from last year in the freezer.
Thanks for sharing:-)