Blueberry Crumble Bars are buttery, sweet, and packed with juicy, fresh blueberries. These are the perfect summer blueberry desserts!
Do you love blueberries? Be sure to try my super easy Blueberry Cobbler recipe!
Easy Blueberry Crumble Bars
If you love a good summer fruit dessert and want to make something other than cobbler or fruit salad, these Blueberry Crumble Bars are for you! These sweet bars are always a hit at any BBQ, party or event and I get asked for the recipe all the time!
The streusel topping is also the crust!
What makes these blueberry bars so easy is that the crumb topping is also the crust! This makes the prep step extra easy! The crumble topping consists of a buttery layer of crumble that you simply press halfway onto the bottom of the pan and then cover with the remaining mixture.
It’s sweet and rich, with the perfect texture thanks to the oatmeal!
This recipe has two parts, the blueberries and the crumble mix. The simplicity is what makes it such a great recipe. For the full ingredient list, see the printable recipe card below in the post.
sprinkles: All-purpose flour, old-fashioned rolled oats, light brown sugar, salt, butter, and granulated sugar.
blueberry mix: Corn starch, blueberries and lemon juice
To prepare blueberry crumble bars:
sprinkles: In your blender or food processor, combine flour, rolled oats, brown sugar, and salt until well combined. Add the cold butter and beat until combined and resembles very coarse sand.
Divide the mixture in half and press half of it into a greased 9×9 pan. Put this aside.
filling: In a large bowl, whisk together granulated sugar and cornstarch. Add the blueberries and brush with the sugar mixture. Add the lemon juice and stir.
Scatter the blueberries over the base. Then spread the remaining crust mixture evenly over the blueberries and press lightly into the blueberries. Place the pan in the fridge for 30 minutes.
Bake: Preheat the oven to 350°F and bake for 35-40 minutes, until fruit starts to bubble.
Tips for making blueberry crumble bars:
What I love most about this recipe is that it is very easy. Here are a few tips to make the process super easy!
- I use my blender to mix the ingredients, but you can easily use a food processor. Or if you prefer elbow grease and a dough cutter, use “Quick Oats” instead of the old-fashioned method.
- Coating the fresh blueberries in sugar and cornstarch creates a sweet filling that also thickens thanks to the cornstarch!
- The blueberries will begin to bubble as they bake. That means the bars are almost done! Don’t over-bake the bars or the crust and topping will become too hard to slice successfully. Trust me!
Can you use frozen blueberries?
Yes, that is absolutely possible. Simply thaw the blueberries and pat dry! This is a great recipe for blueberry season when it’s at its ripest, but frozen blueberries make a great alternative! I always buy or pick extra blueberries during peak season so I can freeze them and enjoy them all year round!
- Add some lemon! Lemon and blueberry go so well together, and you can easily add some lemon to this recipe. You’ve already added some lemon juice to the filling, but also grate the lemon zest and add the zest to the crumble mixture.
- Use other berries. You can absolutely substitute blackberries or raspberries for the blueberries in this recipe, or add a combination of all three!
- Add some cinnamon. Cinnamon added to the crumble mixture can add a warm flavor to the topping. A teaspoon is enough!
How do you store these blueberry bars?
I recommend storing these bars in an airtight container in the refrigerator for up to 3 days. You CAN keep them at room temperature, but I would only recommend doing this for one night. The moisture in the blueberries will cause the topping to get a bit mushy, and refrigeration will slow that process down!
Can You Freeze Blueberry Crumble Bars?
Yes absolutely! These bars freeze very well! Thaw them in the fridge and enjoy chilled or at room temperature!
Looking for more blueberry recipes? Try these:
Sweet Blueberry Crumble Bars will be a hit at your next BBQ!
- 1 1/2 cups all purpose flour
- 1 1/2 cups old-fashioned oats
- 3/4 cups light brown sugar
- 1/2 teaspoon kosher salt
- 1 cup cold butter, diced
- 1/2 cup granulated sugar
- 3 tablespoons cornstarch
- 2 1/2 cups blueberries
- 1 tablespoon lemon juice
- Line a 9×9 pan with parchment paper and coat with nonstick spray. Put aside.
- sprinkles: In your blender or food processor, combine flour, rolled oats, brown sugar, and salt until well combined. Add the cold butter and beat until combined and resembles very coarse sand.
- Divide the mixture in half and press half onto the bottom of the prepared pan to form a crust. Put aside.
- filling: In a large bowl, whisk together granulated sugar and cornstarch. Add the blueberries and brush with the sugar mixture. Add the lemon juice and stir.
- Scatter the blueberries over the base.
- Finally spread the remaining crust mixture over the blueberries and press down lightly.
- Place the pan in the refrigerator for 30 minutes.
- Preheat oven to 350°F and bake for 35-40 minutes, until fruit begins to bubble.
Do not bake for too long or the crust will become too hard.
Cooling the bars before baking is not an option!
Store airtight in the refrigerator for up to 3 days.
Keywords: Cookies and cups, blueberry dessert, blueberry crumble, bar desserts, summer desserts
Would you like to save this recipe?
Find more recipes like this one:
PIN for later: