Line two baking sheets (or one large one, I use this half sheet baking sheet and LOVE it!) with parchment paper. Set aside.

In a large mixing bowl, whisk together the dry ingredients, flour through salt. Rub in the butter with your fingers, until the mixture resembles course crumbs. Add the buttermilk, and stir with a spatula until the dough comes together.

Flour a work surface, and transfer the dough to the floured surface. Using your hands, press the dough out to about 1″ thick, sprinkling with additional flour as necessary. Cut out the biscuits using a cup or cutter about 3″ in diameter. Place each biscuit on the prepared baking sheets. Once all the biscuits are cut, transfer the baking sheets to the fridge for 30-45 minutes.

Preheat the oven to 350 degrees F. Bake for 20 minutes, rotating the pans halfway through.