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In a large bowl, mix flour and salt (and sugar, if using).
Cut in the cold butter using a pastry cutter or your fingers until the mixture resembles coarse crumbs.
Add the sourdough starter and mix gently.
Add ice water 1 tablespoon at a time until the dough just comes together. Avoid overworking.
Step 2: Chill the Dough
Shape the dough into a disk, wrap in plastic, and refrigerate at least 1 hour. Chilling relaxes the gluten, making it easier to roll out and ensuring a flaky texture.
Step 3: Roll Out the Dough
Lightly flour a surface and rolling pin.
Roll out dough to fit your pie dish, about 12 inches in diameter for a 9-inch pie.
Transfer to the pie dish, trim edges, and crimp as desired.
Step 4: Bake
Option 1: Blind bake (for custard pies or quiche): Preheat oven to 375°F (190°C), line with parchment, fill with pie weights, and bake 15–20 minutes.
Option 2: Full bake with filling: Follow your pie recipe instructions.
Notes
Tips for Perfect Sourdough Pie Crust
Keep butter cold: Small pieces create layers, giving a flaky crust.
Don’t overwork: Over-kneading makes a tough crust.
Use a combination of sourdough starter and ice water for optimal texture.
Rest the dough: Letting it chill before rolling prevents shrinking during baking.
Freeze for later: Wrap tightly and freeze for up to 2 months.