2green onions (or scallions), thinly slicedabout 1/2 cup total, white and green parts
3/4cupshredded sharp cheddar cheese
Preheat oven to 425 degrees F. Line a baking sheet with parchment paper and set aside.
In a large bowl, whisk together the flour, baking powder, baking soda, pepper, and salt. Use a pastry cutter, or your fingers, to work in the butter pieces until the mixture is crumbly.
Use a fork to stir in the scallions and the cheese. Stir in the buttermilk until the dough comes together (adding more buttermilk or flour, a tablespoon at a time, if necessary to help the dough come together—dough will neither be sticky nor crumbly).
Transfer dough to a lightly floured cutting board and knead 3 to 4 times. Pat dough into an 8" X 6" rectangle; fold 1 short side a third of the way over the center then fold opposite short side over folded end (like a business letter fold).
Rotate dough clockwise 90 degrees, pat out dough, and repeat folding again. Pat out into one final 8" X 6" rectangle and cut into 8 equal rectangle pieces.
Place on prepared baking sheet and bake until golden brown, about 10 to 15 minutes.