Preheat the oven to 450 degrees Fahrenheit andline a cookie sheet with parchment paper.
In a large bowl whisk together all dry ingredients.
Grate 6 tablespoons of frozen butter with a grater or, cut up chilled vegan butter with a knife into small cubes.
Using a pastry cutter or a metal spoon work the butter into the flour mixture until no big lumps remain. Pea-size pieces of butter are fine. Don’t use your hands and don’t overwork it. In a separate bowl or measuring cup combine plant milk and an egg. Beat lightly together and add to the flour-butter mixture.
Mix together with a metal spoon until dough forms. Don’t use your hands. You want to keep everything cold. The dough will be very soft and a little sticky.
Dust a clean surface with flour and transfer the dough onto it. Dust the top with more flour. Using your hands shape the dough into a rectangle or a square. Don’t work it too much though.
Using more flour if necessary, roll or pat the dough down to 1-inch thick.
Cut out circles using a 2.5-inch round cookie cutter. You will end up with 4 biscuits. Place them on the lined cookie sheet.Then take the remaining dough, work it a little bit, roll and cut out 2 more biscuits.
Brush the biscuits with melted butter to help them brown.
Bake for 13-16 minutes until the tops are lightly golden. Take out of the oven and place on a cooling rack.
Brush with more melted vegan butter if desired.
Let the biscuits cool for 10 minutes before enjoying.