Bacon Cheddar Scones

For the scones:

all-purpose flour

baking powder

salt

ground black pepper (depending on your preference)

cold unsalted butter, cut into small cubes

grated cheddar cheese

green onions, thinly slices

slices bacon, cooked and chopped or crumbled into small pieces

buttermilk (plus up to ½ cup extra, if needed)

For the egg wash:

large egg

water