01 - Whisk together flour, salt, and sugar in a large bowl until thoroughly combined.
02 - Cut cold butter into the dry mixture using a pastry cutter or fingertips until the mixture resembles coarse crumbs with some pea-sized pieces remaining.
03 - Gradually add ice water, mixing gently just until dough holds together when pressed. Divide dough in half and form into two discs. Wrap separately and refrigerate for at least 1 hour.
04 - Roll out one disc on a lightly floured surface to fit your 9-inch pie plate. Press gently into the plate, trim edges even with rim, and refrigerate while preparing the braid.
05 - Roll out the second disc to about 1/4 inch thickness. Cut twelve long, even strips approximately 1/2 inch wide.
06 - Group strips into three sets of four. Pinch tops of each set together. Working with one set, label strips left to right as 1-2-3-4. Cross strip 1 over 2, under 3, then over 4. Repeat with the new left-most strip until fully braided.
07 - Carefully transfer braids to the chilled pie edge, pressing gently to adhere. Trim any excess dough and use water to seal edges if needed.
08 - Refrigerate the assembled pie for 15 minutes to firm the crust. Preheat oven to 400°F.
09 - Brush braids thoroughly with egg wash mixture. For blind baking, line crust with parchment paper and fill with pie weights.
10 - Bake for 12–15 minutes until golden brown. Remove weights and continue baking if a fully crisp crust is desired. Cool before filling according to your chosen pie recipe.