grate slightly more than half--maybe 5 tablespoons--of the frozen butter into the flour and stir until all butter is coated in flour
mix in buttermilk until dough is just coming together
on lightly floured surface, pat dough with floured fingers into a roughly 5"x10" rectangle
fold dough over onto itself and pat out again. Repeat once, twice at most
Cut out biscuits. Use 2 1/2" circular cookie cutter and form scraps together into mutant biscuits or just cut into squares with bench scraper
melt remainder of the stick of butter in a bowl in the microwave
Bake on cookie sheet at 475°F for 10-12 minutes. Brush tops with melted butter once halfway through baking and again at the end.
Serve with sausage gravy and hot sauce