Mix dry ingredients. In a large bowl, whisk together flour, salt, and sugar until well combined.
1 ¾ cups all purpose flour, 2 teaspoons kosher salt, 1 tablespoon sugar
Work in the butter. Add the cold butter pieces and toss to coat in flour. Using your fingertips or a pastry cutter, press and flatten each piece of butter into thin sheets throughout the flour mixture, tossing with flour as needed to prevent sticking. Continue until all butter is flattened. The mixture should still look shaggy and rough.
1 cup unsalted butter
Add water. Drizzle 8 tablespoons ice water over the mixture. Using your hand in a claw shape or a fork, gently toss and fold until a shaggy dough just begins to form. Add more water 1 tablespoon at a time if needed. The dough should barely hold together when pressed but will still look rough.
8-10 tablespoons ice water
Shape and chill. Turn the dough onto a lightly floured surface and gently pat into a rough square about 1-inch thick. Wrap in plastic wrap and refrigerate for at least 2 hours (or up to overnight).
First two turns. Remove chilled dough from fridge. If it's been chilled overnight and feels rock-hard, let it sit at room temperature for 5-10 minutes. On a floured surface, roll into a rectangle roughly 12 x 8 inches. Fold into thirds like a business letter. Turn 90 degrees. Roll out again and fold into thirds. That's 2 turns! If dough becomes sticky, refrigerate for 15-20 minutes.
Complete remaining turns. Repeat the roll-fold-turn process 4 more times for a total of 6 turns. Keep track by making small dimples in the dough with your finger after every 2 turns.
Ready to use! After completing all 6 turns, the dough is ready to roll out and use according to your specific recipe. Refrigerate until ready to use, or freeze for longer storage.