2 cups (250g) all-purpose flour
1/4 teaspoon salt
1/2 cup (120ml) cold water
1 cup (225g) unsalted butter (cold but pliable)
Mix flour, salt and cold water. Make a smooth dough then chill.
Fill cold butter in zip lock bag, seal the bag and flatten the butter with a roller. Once done, chill it to set then strip the bag open to take it out.
Roll out the dough, place butter block, fold the dough in and roll again. Repeat folding 3-4 times.
Wrap the rolled dough and chill until the use.