Rhubarb Blueberry Pie with a Buttery Flaky Crust
This stunning Rhubarb Blueberry Pie layers tart rhubarb with sweet, jammy blueberries inside a golden, flaky homemade crust. It is the ultimate summer dessert that disappears fast at any gathering.
The Summer Pie You Did Not Know You Needed
If you have never paired rhubarb and blueberries in a pie, this recipe is about to change your entire summer baking game. Rhubarb brings a bold, bracingly tart bite. Blueberries bring deep, jammy sweetness. Together, inside a shatteringly crisp, buttery crust, they create something that is so much better than either fruit could manage alone. Think of it as a Blueberry Rhubarb Pie that somehow hits every note at once: bright, fruity, rich, and perfectly balanced.
This is the kind of dessert that earns you a reputation. Whether you are bringing it to a backyard cookout, setting it out at a Sunday dinner, or just baking it because rhubarb season is short and you know it, this pie delivers every single time.
Why This Combination Works So Well
Rhubarb and blueberry recipes have been a quiet staple in home kitchens for generations, and for good reason. The sharp, almost citrusy tartness of rhubarb needs something to round it out. Blueberries do exactly that without tipping the filling into cloying territory.
Unlike a straight Rhubarb Berry Pie where the balance can feel unpredictable, this specific ratio of 3 cups rhubarb to 2 cups blueberries keeps things honest. The filling is jammy but not overly sweet, saucy but not runny, and deeply flavorful in every single bite. A little lemon zest ties the whole blueberry rhubarb pie filling recipe together with a brightness that makes the fruit pop.
Getting Your Tools and Ingredients Right
A great pie starts before you even mix a single ingredient. Using very cold butter, a reliable pastry cutter, and a proper 9-inch pie dish with straight sides makes a real, noticeable difference in the texture and look of the final crust.
How to Make a Perfect Flaky Crust
The secret to this pie is in the crust, and the secret to the crust is cold fat and minimal handling. Here is what to keep in mind:
- Use butter straight from the fridge, cut into small cubes just before you need it.
- Work quickly so the butter does not warm up in your hands.
- Stop mixing the moment the dough just barely holds together. Overworking develops gluten and leads to a tough crust.
- Chill the dough discs for at least one hour. This is not optional. It relaxes the gluten and re-firms the butter, giving you those gorgeous flaky layers.
Chef's Tip: If you want an extra-flaky crust, try grating frozen butter directly into the flour using a box grater. It distributes the fat more evenly and takes even less handling than the cube method.
Building the Blueberry Rhubarb Filling
The filling for this Blueberry Rhubarb Pie Recipe comes together in about five minutes, but a few small choices make a big difference:
- Cornstarch over flour: Cornstarch thickens the filling to a glossy, clean consistency rather than a pasty one.
- Let it macerate briefly: Ten minutes of resting time lets the sugar start drawing out the juices, which means better flavor distribution.
- Taste your rhubarb: Early-season stalks are often more tart than late-season ones. Feel free to nudge the sugar up or down by a tablespoon or two.
This same filling, by the way, is genuinely brilliant in a Blueberry Rhubarb Upside-Down Cake or even spooned warm over vanilla ice cream if you happen to have extra.
Ready to Bake?
All those gorgeous layers of fruit and butter are just waiting to come together. Here is the full step-by-step recipe:
Rhubarb Blueberry Pie with a Buttery Flaky Crust
This stunning Rhubarb Blueberry Pie layers tart rhubarb with sweet, jammy blueberries inside a golden, flaky homemade crust. It is the ultimate summer dessert that disappears fast at any gathering.
Ingredients
- 2 1/2 cups all-purpose flour, plus extra for dusting
- 1 tbsp granulated sugar, for the crust dough
- 1 tsp salt, fine sea salt
- 1 cup unsalted butter, very cold, cubed
- 6 tbsp ice water, added one tablespoon at a time
- 3 cups fresh rhubarb, trimmed and sliced into 0.5-inch pieces
- 2 cups fresh blueberries, rinsed and dried
- 3/4 cup granulated sugar, adjust to taste depending on rhubarb tartness
- 3 tbsp cornstarch, for thickening the filling
- 1 tbsp lemon juice, freshly squeezed
- 1 tsp lemon zest, from about half a lemon
- 1/2 tsp vanilla extract, pure
- 1 large egg, beaten, for egg wash
- 1 tbsp coarse sugar, for sprinkling on top crust
Instruction
Make the pie crust: In a large bowl, whisk together the flour, 1 tablespoon of sugar, and salt. Add the cold cubed butter and use a pastry cutter or your fingertips to work it in until the mixture resembles coarse crumbs with pea-sized butter pieces remaining.
Drizzle in the ice water one tablespoon at a time, stirring gently with a fork after each addition, until the dough just comes together. Divide the dough into two equal discs, wrap each in plastic wrap, and refrigerate for at least 1 hour or overnight.
Preheat your oven to 400 degrees F (200 degrees C). Place a rimmed baking sheet on the lower oven rack to catch any drips.
Make the filling: In a large bowl, combine the sliced rhubarb, blueberries, 0.75 cup of sugar, cornstarch, lemon juice, lemon zest, and vanilla extract. Stir gently until everything is evenly coated. Let the mixture sit for 10 minutes.
On a lightly floured surface, roll out one disc of dough into a 12-inch circle. Carefully transfer it to a 9-inch pie dish, pressing it gently into the bottom and sides. Trim any overhang to about 1 inch.
Pour the blueberry rhubarb pie filling into the prepared crust, spreading it into an even layer.
Roll out the second dough disc into another 12-inch circle. Drape it over the filling. Trim, fold, and crimp the edges together to seal. Cut 5 to 6 steam vents in the top crust using a sharp knife.
Brush the top crust generously with the beaten egg wash and sprinkle with coarse sugar.
Place the pie on the preheated baking sheet. Bake at 400 degrees F for 20 minutes, then reduce the oven temperature to 350 degrees F (175 degrees C) and continue baking for 35 more minutes, until the crust is deep golden and the filling is bubbling through the vents.
Transfer the pie to a wire rack and let it cool for at least 2 to 3 hours before slicing. This allows the filling to set completely.
Equipment
- 9-inch pie dish
- Large mixing bowl
- Pastry cutter or food processor
- Rolling pin
- Rimmed baking sheet
- Wire cooling rack
- Pastry brush
- Sharp knife or pastry wheel
Notes
Serving and Storing Your Pie
For the cleanest, most Instagram-worthy slices, wait the full 2 to 3 hours for the pie to cool. It is genuinely worth the patience. Serve with a scoop of vanilla ice cream or a generous dollop of lightly sweetened whipped cream.
Leftovers keep beautifully. The pie holds at room temperature for up to 2 days or in the refrigerator for up to 5 days. It also freezes exceptionally well for up to 3 months, making it one of the most practical rhubarb blueberry recipes in your repertoire to make ahead during peak season.
Whether this is your first time diving into blueberry and rhubarb recipes or you are a seasoned rhubarb devotee, this pie is the recipe you will come back to every single year.
