These sourdough buttermilk biscuits are so flakey that they literally melt in your mouth. Get out your active sourdough starter and start the timer for 40 minutes!
In a large bowl, combine all the dry ingredients. Grate the butter using the large side of a grater. Toss it with the flour mixture as you grate in the butter.
In a separate dish, whisk the sourdough starter with the buttermilk.
Add the wet ingredients to the flour. Stir to combine.
Flour your working surface. Roll out the dough to 1-2 inches in thickness. Cut 2-inch rounds.
Bake at 450°F for about 15 minutes or until golden brown. Serve while warm. Enjoy!