Instructions

1. 1
   Preheat oven to 450°F (230°C).
2. 2
   Line a baking sheet with parchment paper.
3. 3
   In a large bowl, whisk together the flour, baking powder, baking soda, and salt.
4. 4
   Grate the frozen butter into the flour mixture and toss lightly with a fork to coat.
5. 5
   Pour in the cold buttermilk and stir gently just until a shaggy dough begins to form.
6. 6
   Turn out onto a floured counter.
7. 7
   Pat into a rectangle, then fold it in half.
8. 8
   Turn 90 degrees and repeat this process 5 times to build layers.
9. 9
   Pat dough down to 1 inch thick.
10. 10
    Cut into rounds using a sharp 2.5- inch biscuit cutter without twisting the cutter (twisting seals the edges and prevents rising).
11. 11
    Arrange biscuits closely together on the baking sheet so they touch (this helps them rise higher).
12. 12
    Bake for 12 to 15 minutes until the tops are beautifully golden brown.
13. 13
    Brush with additional melted butter if desired.