Line two cookie sheets with parchment paper. Set aside.
Pre-heat oven to 425 degrees F (220 c.)
Sift all dry ingredients together in a large bowl. Add butter slices, thumbing in to the flour mixture (or using a pastry cutter), until butter is integrated throughout, until left with small crumbs.
Slowly pour in buttermilk, stirring until just combined. Add cheddar cheese and combine in with your hands. You will have a very sticky dough.
Use a floured ice cream scoop, or your hands, to make 20 balls of dough of equal sizes and drop onto your cookie sheets.
Bake 12-15 minutes until they are golden on top.
Serve immediately or keep for up to 3 days in an air-tight container.