Cut in cold butter with cutting knife or with stand mixer on low. Leave some butter in chunks.
12 Tbsp cold butter
Gently fold in buttermilk by hand.
1-1/2 cup buttermilk
Flour your work surface and dump biscuit dough on to it. Gently fold dough a couple times with floured hands. Flour your biscuit cutter and cut biscuits, DO NO TWIST CUTTER. Place biscuits on baking sheet or in cast iron skillet.
Bake in very hot oven for 8-10 minutes, watching for tanned tops.