- Crust:
- 2 cups self-rising flour
- 2/3 cup vegetable oil
- 1/3 cup water
- Filling:
- 2 cups blueberries, or more to taste
- 1 cup white sugar
- 1/4 cup all-purpose flour
- 1 tablespoon lemon juice
- 1 pinch salt
- 2 tablespoons butter, cut into small cubes
- Preheat oven to 400 degrees F (200 degrees C).
- Mix 2 cups self-rising flour, oil, and water together in a bowl until pie crust dough is well-mixed; divide into 2 balls. Roll each ball between 2 pieces of waxed paper until flattened and about 9 inches in diameter. Turn 1 piece of dough over pie dish and peel off top piece of waxed paper. Trim crust if needed. Set remaining dough aside.
- Combine blueberries, sugar, 1/4 cup all-purpose flour, lemon juice, and salt together in a bowl until evenly mixed; pour into the pie crust. Cover blueberry filling with remaining dough, crimping the edges together. Arrange butter cubes on top crust.
- Bake in the preheated oven until filling is thick and crust is golden brown, about 50 minutes.