Preheat your oven to 425F.
In a large bowl, whisk together the flour, baking powder, granulated sugar and salt.
Use a box grater to grate the butter into the flour. Once grated, toss with your fingers until all the butter pieces are coated in flour. After the pieces are coated, mix with your fingers until no piece of butter is bigger than a lentil.
Using a fork and whisking constantly, gradually drizzle in the ice cold milk. Whisk until you get a rough dough, then switch to using your hands to bring the dough together. Try to use your hands as little as possible in order to keep the dough cold!
On a lightly floured surface, pull the dough out to a rectangle shape. Do a tri-fold as outlined in the photos above. Fold one third of the dough into the middle, and then fold the other third on top of it. Rotate the dough 90 degrees, flatten out into a rectangle and repeat the process 2-3 more times. Try to use as little flour as possible.
Once you've done a few folds, use both hands to gently rotate the dough and then pull it towards you. Most of the flour on the counter should be gone, so the bottom of the dough should lightly stick, and when you pull it towards you it will tighten. This is to tighten up the bottom of the biscuit and create a circular shape.
After your biscuit is formed, put it on a parchment lined baking sheet and brush with more melted vegan butter or egg wash if you are not vegan.
Bake at 435 for 12-15 minutes or until golden. Serve and enjoy!