Mix the dough: Combine flour, salt, cold butter cubes and cold water in a bowl. Mix just until the dough comes together. The butter should remain visible in small pieces.
Roll: Shape the dough into a rectangle and roll it to about 3× its size.
Turn 1: Fold the dough into thirds like a letter.
Turns 2–4: Rotate the dough 90° each time, roll out again and repeat the fold until you have completed 4 turns total.
Rest: Wrap the dough and chill for at least 2 hours.
Final roll (Turn 5): Roll the dough out one last time to about 4–5 mm thickness before using it for your pastries.
