01 - Whisk flour, salt, and sugar in a large bowl until evenly combined.
02 - Work cold butter into flour using a pastry cutter or fingertips until mixture resembles coarse crumbs with pea-sized butter pieces remaining.
03 - Gradually drizzle ice water while mixing gently. Stop when dough just holds together. Divide in half, form into discs, wrap, and refrigerate for at least 1 hour.
04 - Roll one dough disc on floured surface to fit 9-inch pie plate. Press into plate, trim edges, and refrigerate while preparing braids.
05 - Roll remaining dough to 1/4-inch thickness. Cut twelve even strips approximately 1/2-inch wide and 6-8 inches long.
06 - Group strips into sets of four. Pinch tops together. Working left to right, cross outermost strip over next, under following, then over last. Repeat until fully braided.
07 - Position braids along chilled pie crust edge. Press gently to seal, using water if needed. Trim excess dough.
08 - Refrigerate assembled pie for 15 minutes. Preheat oven to 400°F.
09 - Brush braids thoroughly with beaten egg mixed with milk for golden coloring.
10 - Line crust with parchment paper and fill with pie weights. Bake for 12-15 minutes until golden brown.
11 - Remove weights and parchment. Continue baking until bottom is fully crisp and golden, approximately 3-5 additional minutes.