Perfect Blackberry Pie

Total Time: 1 hr 40 mins Preparation Time: 40 mins Cook Time: 1 hr

Ingredients

• classic pie crust (see classic pie crust, idiot proof step-by-step photo tutorial)
• 5 1/2 cups fresh blackberries
• 3/4 cup granulated sugar, plus
• 2 tablespoons granulated sugar
• 1 pinch salt
• 1/4 cup potato starch or 1/4 cup potato flour
• 1 teaspoon finely grated lemon, zest of
• 1 tablespoon butter, cut into small pieces
• 1 egg , beaten,for pastry wash
• 1 1/2 tablespoons granulated sugar

Recipe

• 1 adjust oven rack to lowest position and place four 9-inch unglazed quarry tiles on rack to form an 18-inch square.
• 2 (a pizza stone will work, too.) preheat oven to 400 degrees and let tiles heat for at least 30 minutes.
• 3 purée 1 cup of the blackberries in a food processor fitted with the metal blade; set aside.
• 4 stirring constantly with a rubber spatula, bring the sugar, salt, starch and blackberry purée to the consistency of thick jam over medium-low heat in a large saucepan.
• 5 stir in lemon zest.
• 6 pour thickener over remaining blackberries and stir to combine.
• 7 pour blackberry filling into bottom pie shell and dot with the 1 tb.
• 8 butter.
• 9 cover with top layer of pastry dough.
• 10 set an 18-inch square of heavy-duty foil on tiles or pizza stone.
• 11 set pie on foil and bake for 20 minutes.
• 12 remove pie from oven, brush with beaten egg , sprinkle with 1 1/2 tbs.
• 13 sugar.
• 14 bake until golden brown, about 20 minutes longer.
• 15 bring foil around pie to loosely cover.
• 16 bake until filling bubbles, 15-20 minutes longer.
• 17 cool on a wire rack, 2-3 hours.