Whisk or sift the flour and salt together in a large bowl.

Grate in the frozen butter into the bowl .

Stir with a knife until all the butter is covered with flour .

Add the cold water and stir with a knife until a dough forms. It will look rough and shaggy.

On a well floured surface, roll out the dough into a rectangle ( around 10 inch long) . Fold the bottom third over the middle third , and then the top third over the middle third (like a letter)

Rotate the dough one quarter of a circle, roll it out again and refold as above.

Repeat for 6-7 times. The dough will start out crumbly , but will get smoother as you carry on. Chill for 15 minutes if you feel the butter is melting and then continue.

Cover with cling wrap and chill for atleast one hour in the refrigerator. Use as needed!