Can I make this pie ahead of time?
Yes, you can prepare the pie a day in advance and store it covered in the refrigerator. Reheat before serving.
BREAKFAST
Nordic Blueberry Pie with Toasted Oat Crumble
Experience the comforting flavors of Finland with this classic Mustikkapiirakka. A tender, buttery crust cradles a generous filling of sweet, juicy blueberries, all crowned with a delightful, golden oat crumble. It's a versatile treat, perfect for a cozy breakfast or a satisfying dessert.
HOW TO MAKE IT
Let's cook.
01
Prepare the crust: In a large bowl, combine 1 1/2 cups all-purpose flour and 1/4 cup granulated sugar. Cut in 1/2 cup cold unsalted butter until the mixture resembles coarse crumbs. Add 2 tablespoons cold water, one tablespoon at a time, mixing until the dough just comes together. Press the dough evenly into a 9-inch pie plate.
02
Prepare the filling: In a separate bowl, gently toss 4 cups fresh blueberries with 1/4 cup granulated sugar and 2 tablespoons all-purpose flour. Pour the blueberry mixture into the prepared pie crust.
03
Prepare the oat crumble: In a medium bowl, combine 1/2 cup rolled oats, 1/4 cup all-purpose flour, and 1/4 cup packed light brown sugar. Cut in 1/4 cup cold unsalted butter until the mixture forms a coarse, crumbly topping.
04
Sprinkle the oat crumble evenly over the blueberry filling.
05
Bake the pie in an oven preheated to 375°F/190°C for 40-45 minutes, or until the crust is golden brown and the filling is bubbly.
06
Allow the pie to cool on a wire rack for at least 30 minutes before slicing and serving. This helps the filling set properly.
About This Recipe
Experience the comforting flavors of Finland with this classic Mustikkapiirakka. A tender, buttery crust cradles a generous filling of sweet, juicy blueberries, all crowned with a delightful, golden oat crumble. It's a versatile treat, perfect for a cozy breakfast or a satisfying dessert.
Simple ingredients.
Big flavor.✦
Big flavor.✦
Chef's Tips
For extra flavor, add 1/2 teaspoon of ground cinnamon or a pinch of cardamom to the oat crumble mixture. If using frozen blueberries, do not thaw them first; simply toss them with the sugar and flour and add an extra 5-10 minutes to the baking time.
Easy Substitutions
You can substitute other berries like raspberries or mixed berries for blueberries. For a gluten-free option, use a gluten-free all-purpose flour blend for both the crust and crumble, and ensure oats are certified gluten-free. Vegan butter can be used for a dairy-free version.
Storage & Reheating
Store leftover pie covered at room temperature for up to 2 days, or in the refrigerator for up to 4 days. Reheat gently in the oven at 300°F/150°C for 10-15 minutes if desired.
Serving Suggestions
Serve warm with a scoop of vanilla ice cream, a dollop of whipped cream, or a drizzle of crème fraîche. It's also delicious on its own with a cup of coffee or tea for breakfast.
Common Mistakes
1. Overworking the pie crust dough, leading to a tough crust. Mix just until combined. 2. Not cooling the pie sufficiently before slicing, which can result in a runny filling. 3. Using warm butter for the crumble, which makes it greasy instead of crumbly. Ensure butter is cold. 4. Not tossing blueberries with flour, which can lead to a watery filling.
Frequently Asked Questions
What kind of oats should I use?
Rolled oats (old-fashioned oats) are best for the crumble as they provide a good texture. Instant oats will be too fine.
Why is my blueberry filling runny?
This can happen if the blueberries weren't tossed with enough flour or if the pie wasn't cooled long enough. The flour helps absorb excess moisture and thicken the juices as it bakes and cools.
MORE TO KNOW
The key to a flaky pie crust is to use very cold butter and handle the dough as little as possible. Overworking the dough develops gluten, leading to a tough crust. For the crumble, you can use your fingertips or a pastry blender to incorporate the butter, aiming for a texture that resembles coarse sand with some pea-sized butter pieces.
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