01 - Preheat the oven to 425°F. Line a baking sheet with parchment paper.
02 - Whisk together flour, baking powder, baking soda, salt, pepper, and herbs in a large bowl.
03 - Add cold diced butter and use a pastry cutter or fingers to blend until mixture resembles coarse crumbs.
04 - Stir in grated cheddar and chopped herbs if using.
05 - Pour in buttermilk and gently mix until dough just comes together; avoid overmixing.
06 - Turn dough onto a lightly floured surface and pat into a 3/4-inch thick rectangle.
07 - Cut dough into rounds with a biscuit cutter or glass. Place on baking sheet, spaced slightly apart.
08 - Brush tops lightly with extra buttermilk. Bake for 13 to 15 minutes until golden and puffed.