Plum-Blackberry Streusel Pie

A delicious deep-dish pie featuring a perfect combination of sweet plums and blackberries, topped with a crispy oat streusel topping. This rustic dessert balances the tartness of fresh fruit with a buttery, crumbly topping.

8 servings
2 hr 20 min

Ingredients

  • pound plums
  • ¾ pound blackberries
  • cups sugar
  • 3 tablespoons quick-cooking tapioca
  • 2 tablespoons cornstarch
  • 1 teaspoon lemon zest
  • ¾ teaspoon salt
  • ½ recipe all-butter pastry dough
  • 1 cup old-fashioned rolled oats
  • ½ cup all-purpose flour
  • 1 stick unsalted butter
  • 1 piece deep-dish pie plate

Cooking Instructions

  1. 1.

    Put a foil-lined large baking sheet in lower third of oven and preheat oven to 375°F.

    10 min

  2. 2.

    Toss plums and blackberries with 1 cup sugar, tapioca, cornstarch, zest, and 1/4 teaspoon salt in a large bowl.

    5 min

  3. 3.

    Roll out dough into a 13-inch round on a lightly floured surface with a lightly floured rolling pin. Fit into pie plate. Trim excess dough, leaving a 1/2-inch overhang. Fold overhang under and press against rim of pie plate, then crimp decoratively. Chill while making streusel.

    20 min

  4. 4.

    Stir together oats, flour, and remaining 1/2 cup sugar and 1/2 tsp salt. Blend in butter with your fingertips until mixture forms small clumps.

    10 min

  5. 5.

    Mound filling in shell. Crumble streusel evenly over filling.

    5 min

  6. 6.

    Bake pie until streusel is golden and filling is bubbling, 1 1/4 to 1 1/2 hours. Cool completely, 3 to 4 hours.

    90 min