Blueberry Crumble Pie

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The “Violet-Gold” Blueberry Crumble Pie

This version uses a “Salty-Oat” crumble to provide a savory contrast to the sweet, bursting berries.

CategoryDetails
Prep Time20 minutes
Bake Time45–55 minutes
Total Time1 hour 15 minutes
Yield1 9-inch Pie

🍴 Ingredients

  • The “Lattice” Base:
    • 1 9-inch Pie crust (pre-made or homemade—unbaked)
  • The “Bursting” Filling:
    • 6 cups Fresh blueberries (or frozen—do not thaw)
    • ½ cup Granulated sugar
    • 3 tbsp Cornstarch & ¼ tsp Salt
    • 1 tbsp Lemon juice & 1 tsp Lemon zest
  • The “Oat-Shatter” Crumble:
    • 1 cup All-purpose flour
    • ½ cup Old-fashioned rolled oats
    • ½ cup Brown sugar (packed)
    • ½ cup (1 stick) Cold unsalted butter (cubed)
    • ½ tsp Cinnamon & ¼ tsp Flaky sea salt

👩‍🍳 Instructions

1. The Crust “Seal”

  • Preheat your oven to 200°C (400°F).
  • Press your pie crust into the tin and crimp the edges. The Pro Move: Brush the bottom of the raw crust with a thin layer of beaten egg white. This creates a “waterproof” barrier that keeps the crust crisp despite the heavy berry juice.

2. The Berry “Bloom”

  • In a large bowl, toss the blueberries with the lemon zest, lemon juice, and cornstarch.
  • Once coated, stir in the sugar and salt. Pour the mixture into the prepared crust.

3. The “Rubbed” Crumble

  • In a medium bowl, combine the flour, oats, brown sugar, cinnamon, and sea salt.
  • Using your fingers or a pastry cutter, work the cold butter cubes into the dry mix until it looks like “wet sand” with pea-sized clumps.
  • The Rule: Keep the butter cold! If it melts now, the crumble will turn into a flat cookie instead of a jagged, crunchy topping.

4. The “Snowcap” Layer

  • Pile the crumble high over the berries. It will look like a mountain, but it will settle as the berries collapse during baking.

5. The “Bubble-and-Brown” Bake

  • Bake for 45–55 minutes.
  • The Visual Cue: You are looking for two things: the crumble must be golden brown, and the deep purple juice must be thick and bubbling in the center. Let the pie cool for at least 3 hours before slicing to allow the filling to set.

The “Vanilla-Bean” Hack: Stir the seeds of one vanilla bean (or 1 tsp of paste) into the blueberry filling. Vanilla acts as a “bridge” between the acidity of the lemon and the sweetness of the sugar, making the blueberries taste twice as intense.

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