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