Put some water and ice in a small bowl or cup to get the water nice and chilled before using.
Place the flour in a mixing bowl. Use your cheese grater and grate your chilled butter into the bowl with the flour.
Use a pastry cutter to combine flour and butter into a crumble.
Measure the chilled water and add it to the flour mixture. Stir to combine as best as possible. Use your hands to form a dough ball. You should see bits of butter, which is what you want.
Place the dough ball on a lightly floured surface and pat it into a rectangle using your hands. Using a rolling pin, roll the dough into a rectangle.
Fold the dough into thirds, rotate sideways, roll it out into a rectangle again and repeat 5 or 6 more times.
Place the dough in a ziplock bag and refrigerate for at least 1 hour before using. Once chilled, use your dough for whatever recipe you are making.