Description

This Golden Blackberry Rhubarb Pie offers a perfect harmony between tangy rhubarb and sweet blackberries complemented by a crunchy, cinnamon-spiced walnut crumble topping. It’s a delightful mix of textures and flavors that strikes a balance between sweet and tart, making it an irresistible dessert for family gatherings or potlucks. The recipe is straightforward, requiring no pastry expertise and takes under 90 minutes from start to finish. Serve it warm with vanilla ice cream, whipped cream, or Greek yogurt for a delicious treat any time of year.

Ingredients

Scale

For the Base:

1 pie crust (recommend Pillsbury for consistent, flaky texture)

For the Filling:

8 rhubarb stalks, cut into 1/2-inch thick slices
16 oz blackberries
1 cup sugar
2 tbsp cornstarch
1/2 teaspoon vanilla extract

For the Topping:

1/2 cup butter (preferably Kerrygold for richer crumble)
1/2 cup sugar
1 cup all-purpose flour (King Arthur recommended)
1/2 cup walnuts, coarsely chopped
1/4 teaspoon ground cinnamon

Instructions

Prepare Mise en Place and Preheat: Preheat the oven to 350°F. Cut rhubarb stalks into uniform 1/2-inch pieces, coarsely chop walnuts, and measure all dry ingredients. Ensuring everything is ready before assembly will make the cooking process smoother and more efficient.
Make Walnut Crumble Topping: In a bowl, combine butter, 1/2 cup sugar, flour, chopped walnuts, and cinnamon. Use a fork or your fingertips to mix until it forms coarse crumbs with pea-sized butter pieces. Using Kerrygold butter enhances the richness and texture. Set aside the crumble while preparing the filling.
Combine Fruit Filling: In a separate bowl, toss the rhubarb slices, blackberries, 1 cup sugar, cornstarch, and vanilla extract until well-coated. Allow the mixture to rest for 1-2 minutes so flavors meld and cornstarch starts absorbing moisture to prevent a watery filling.
Assemble and Bake: Place the pie crust into a 9-inch pie dish. Pour the fruit filling evenly into the crust. Evenly distribute the crumble topping over the filling, pressing gently to help it adhere while keeping it loose for crispness. Leave small gaps in the topping to let steam escape, avoiding soggy crust. Bake for 50-60 minutes until the crumble is golden and filling bubbles at the edges. Tent with foil if topping browns too quickly during baking.
Cool and Serve: Remove pie from oven and cool on a wire rack for 20-30 minutes to let the filling set and crust firm up. Slice and serve warm or at room temperature, ideally with vanilla ice cream, whipped cream, or Greek yogurt for added creaminess.

Notes

Use fresh, firm rhubarb stalks; color does not affect flavor. Frozen rhubarb can be used if thawed and drained.
Uniform 1/2-inch cuts of rhubarb ensure even cooking and texture.
Letting fruit mixture sit 10-15 minutes after mixing sugar and cornstarch reduces excess moisture and prevents soggy filling.
Blind bake pie shell for 10 minutes if concerned about soggy bottom crust (optional).
Keep crumble topping cold for better texture; use cold butter or substitute with solid coconut oil for dairy-free option.
To protect topping, tent pie with aluminum foil during last 20 minutes if it browns too fast.
Substitute blackberries with raspberries, blueberries, or strawberries keeping total fruit quantity the same (2-3 cups).
Replace walnuts with pecans or almonds or omit nuts for nut-free pie.
Use tapioca starch or arrowroot powder as cornstarch alternatives.
Store-bought pie crust is fine; homemade crust preferred for best texture.
Store pie at room temperature up to 2 days; refrigerate for 4-5 days. Freeze wrapped pie (baked or unbaked) up to 3 months.
To serve chilled or frozen pie, let it come to room temperature or warm in 350°F oven for 15-20 minutes before serving.

Prep Time: 25 minutes
Cook Time: 55 minutes
Category: Dessert
Method: Baking
Cuisine: American

Keywords: blackberry pie, rhubarb pie, fruit pie, crumble topping, walnut crumble, summer dessert, tart and sweet pie, easy pie recipe