Making homemade pie crust from scratch can be intimidating, but adding sourdough discard makes it practically foolproof. This flaky all-butter sourdough discard pie crust yields blistered, golden-brown pastry layers that shatter delightfully with a fork, providing the ultimate foundation for fruit pies, pumpkin pies, or savory quiches and pot pies.
The lactic acid in the sourdough discard naturally tenderizes the pastry dough, preventing the gluten from toughening up even if you handle the dough slightly more than usual.
The Chemistry of Ultra-Flaky Pastry
- Pea-Sized Butter Pockets: Leaving visible chunks of cold butter throughout the flour guarantees giant steam pockets in the oven that bake into distinct flaky layers.
- Acidity Tenderizes Gluten: Just as vinegar or vodka is often added to pie crust to inhibit tough gluten networks, sourdough discard delivers natural acid while contributing unmatched depth of flavor.
- Cold Is King: Keeping all ingredients—especially the discard, butter, and water—ice cold ensures the butter doesn’t melt into the flour before baking.
Ingredients for a Double Crust (or 2 Single Crusts)
- All-Purpose Flour (300g / 2 1/2 cups): Cold.
- Fine Sea Salt (6g / 1 tsp) & Granulated Sugar (12g / 1 tbsp).
- Unsalted Butter (225g / 1 cup / 2 sticks, ice cold): Cut into 1/2-inch cubes.
- Sourdough Discard (120g / 1/2 cup, cold straight from fridge).
- Ice Water (30 to 60g / 2 to 4 tbsp): Only as needed to bring the dough together.
Step-by-Step Pastry Method
- Combine Dry & Cut Butter: In a large chilled bowl, whisk flour, sugar, and salt. Add the cold cubed butter. Use a pastry blender (or your fingertips) to cut the butter into the flour until the pieces resemble a mix of pea-sized and almond-sized flakes.
- Add Sourdough Discard: Whisk the cold sourdough discard with 2 tbsp of ice water. Drizzle over the flour-butter mixture. Use a fork or your hands to toss the mixture together until a shaggy, clumped dough forms. Add 1–2 more tablespoons of ice water only if dry flour remains at the bottom.
- Divide & Chill: Turn dough onto a clean counter. Divide into two equal portions. Press each portion firmly into a round disk about 1-inch thick. Wrap tightly in plastic wrap and refrigerate for at least 2 hours (or up to 3 days).
- Roll & Crimp: On a lightly floured surface, roll one disk from the center outward into a 12-inch circle. Transfer gently into a 9-inch pie dish. Trim and crimp the edges as desired.
- Blind Bake or Fill: For filled pies, add filling and bake as directed. For blind-baking, line crust with parchment and pie weights, then bake at 400°F (200°C) for 15 minutes, remove weights, and bake 10–12 more minutes until golden.
🥖 Free Sourdough Troubleshooting Guide
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Flaky Sourdough Discard Pie Crust
Ultra-flaky all-butter pastry crust made with cold sourdough discard for sweet dessert pies or savory quiches.
Ingredients:
- 300g all-purpose flour (2 1/2 cups)
- 1 tsp fine sea salt
- 1 tbsp granulated sugar
- 225g cold unsalted butter (1 cup / 2 sticks, cubed)
- 120g cold sourdough starter discard (1/2 cup)
- 2 to 4 tbsp ice water (as needed)
Instructions:
- Whisk flour, salt, and sugar. Cut in cold butter to pea-sized chunks.
- Drizzle cold discard and ice water; toss until dough clumps together.
- Divide into 2 disks, wrap in plastic, and chill for at least 2 hours.
- Roll into 12-inch circles and transfer to pie dishes; crimp edges.
- Blind-bake with weights at 400°F (200°C) or fill with your favorite sweet or savory filling.
More Sourdough Discard Dessert Favorites
Love baking desserts with your extra starter? Check out our fudgy sourdough brownies and our chewy chocolate chip cookies.