In a large bowl combine all the dry ingredients together.
Grate frozen butter on the large side of the grater and add to dry ingredients. Toss butter in flour as you grate it to coat it.
Add cold buttermilk to the ingredients. Use a spatula to stir and combine together. Work quickly and don't over-mix.
Scoop the dough onto a floured surface. Fold it over a few times. It might be crumbly and flaky, that is totally fine. Roll out the dough into 1 1/2 inch thickness.
Cut 2 or 3 inch sized biscuits. Place them on a lined baking sheet. Bake at 450°F for 15 minutes or until they are golden brown.