Preheat the oven to 425°F.
Whisk together dry ingredients (flour, baking powder, sugar, salt).
Cut in butter. Keep on cutting until it resembles coarse crumbs.
Stir in 1 cup of the cheese. If you're adding chives to the recipe, now would be the time to stir them in, too.
Gently stir in buttermilk to form a soft dough.
Turn out the dough onto a lightly-floured work surface.
Gently knead the dough 10 times. Don't overwork it! We don't want the butter to be totally incorporated.
Pat the dough into a rough circle approximately ½- to ¾-inch thick.
Flour the round cutter and cut out 12-16 biscuits. Once you run out of dough, press the scraps together and cut some more out, until you can't do any more.
Place the biscuits on a silpat- or parchment-lined baking sheet.
Liberally (very liberally) brush the biscuits with buttermilk.
Top with a generous amount of flaky salt and the rest of the cheese.
Bake 14-16 minutes until the cheese on top has bubbled and the biscuits are golden.