These blueberry pie bar are filled with a rich, juicy blueberry layer and topped with a buttery brown sugar crumble. The best part? The crust and topping are made from the same mixture, so you do not need extra bowl or complicated steps. They are the simple way to prepare, easy to carry, serve beautifully, and even freeze well.
If you enjoy blueberry crumble pie but feel nervous about making pie crust from scratch, this recipe is perfect for you. You will get all the same delicious flavors without the stress of rolling, chilling, or shaping dough. With only one easy mixture used for both the base and topping. The dessert becomes quick and hassle-free.
Why You Will Love These Blueberry Pie Bars
These bars are:
- Faster than most fruit desserts, no peeling, chopping, or pitting required
- Much easier than traditional pie, the crust and topping come from one bowl
- Packed with flavor thanks to a jam-like blueberry filling and buttery oat crust
- Perfect for making ahead of time
- Made without eggs
- Easy to transport, slice, serve, and store
Ingredients for Blueberry Pie Bars
You only need a few basic ingredients to make these delicious bars.
Crust & Crumble Topping (Same Mixture)
This step is very simple. Everything is mixed in one bowl using a spatula, no mixer needed. The same dough is used for both the base and topping.
- All-purpose flour: Form the base of the crust and crumbles
- Oats: Use rolled oats or quick oats. Keep 2 tablespoons aside for the topping
- Brown sugar: Add moisture and rich the flavor
- Baking powder: Keep the texture light instead of dense
- Salt, cinnamon, and lemon zest: Small amounts but essential for enhancing flavor
- Melted butter: Binds everything together and give a rich, buttery taste
Mix all ingredients until you get a crumbly texture with no dry spots. Set aside about one-third of the mixture for the topping. Press the remaining dough into a lined 9-inch square baking pan to form the crust.
Preparing the Filling
The blueberry filling is simple and comes together quickly. You will need:
- Fresh blueberries (best choice for flavor)
- Sugar
- Cornstarch
- Lemon juice
- Lemon zest
Cook everything gently on the stove until the mixture starts to thicken and becomes glossy. Then spread it over the prepared crust.
Baking the Bars
After adding the filling, sprinkle the remaining crumble mixture evenly on top. Lightly press it down.
Bake for 45–55 minutes until:
- The top turns lightly golden
- The blueberry filling bubbles around the edges
Now comes the hardest part, waiting! The bars must cool completely before cutting.
How to Cut Perfect Squares
Let the bars cool fully, only like you would with a pie. Cutting them too early will cause them to fall apart. Once cooled:
- Lift the bars out using parchment paper
- Place on a cutting board
- Slice with a sharp knife
- Clean the knife between cut for neat squares
For best results, prepare them a day before serving so they set properly.
Serving Suggestions
Even though these are handheld bars, they can be slightly messy because of the juicy filling. It is best to serve them with:
- A plate and a fork
- Or at least a napkin
You can enjoy them:
- Cold
- At room temperature
- Warm with a scoop of the vanilla ice cream
They also taste amazing with whipped cream on top.
Recipe Summary
Description
Enjoy all the flavors of blueberry pie without the effort of making a pie crust. These bars feature a buttery base, a juicy blueberry filling, and a crumbly oat topping, all made from a single simple mixture. Make sure to cool completely before slicing.
Ingredients
Crust + Topping
- 1 and 1/2 cup (188g) all-purpose flour
- 1 cup (85g) rolled oats + 2 Tablespoons (divided)
- 1/2 cup (100g) brown sugar
- 1 teaspoon baking powder
- 1 teaspoon lemon zest
- 1/4 teaspoon cinnamon
- 1/8 teaspoon salt
- 10 Tablespoons (142g) unsalted butter, melted
Filling
- 4 and 1/2 cups (640g) blueberries
- 1/2 cup (100g) sugar
- 2 Tablespoons cornstarch
- 1 Tablespoon lemon juice
- 2 teaspoons lemon zest
Instructions
- Preheat oven to 350°F (177°C). Line a 9-inch square pan with parchment paper.
- In a bowl, mix flour, oat, sugar, baking powder, lemon zest, cinnamon, and salt. Add melted butter and mix until crumbly.
- Press the mixture into the pan to form the crust. Bake for 10 minutes.
- Cook blueberries, sugar, cornstarch, and lemon juice on the stove for 2–3 minutes. Remove from heat and add lemon zest.
- Spread filling over the crust. Add remaining oats to the crumble mixture and sprinkle on top.
- Bake for 45–55 minute until golden and bubbly.
- Cool completely, then lift and cut into squares.
Storage Tips
- Store at room temperature for up to 2 days
- Refrigerate for up to 1 week
- Freeze for up to 3 months
Notes
- Fresh blueberries give the best results, but frozen can be used (do not thaw)
- For a larger batch, double the ingredients and bake in a 9×13-inch pan
- Cooling completely is essential for clean slices