I made something similar to this and my husband insisted on calling them scones!
that is because they have sugar in them! Try this:
2 cups flour (sifted 3 times better yet use cake flour)
2 1/4 teaspoon baking powder
1 teaspoon salt
1/4 teaspoon baking soda
6 tablespoons butter room temperature
3/4 cups buttermilk
Preheat oven to 400 degrees
sift dry ingredients together 3 times then cut in the butter (I use a pastry cutter but you can do it with a fork or 2 knives)
add buttermilk
mix together then place on a floured wooden board and knead until dough is elastic not too wet
pat out to the thickness of your liking and use a biscuit cutter if one is not available you can use cookie cutters in various shapes (I do not beat my biscuits either as recommended in the other recipe, mine the less you handle them the better and the higher they will rise)
Bake at 400 degrees for 10-12 minutes my oven cooks hot so I bake them at 350 or the bottom gets too brown
You can brush with milk or butter before baking if you prefer
I do not add sugar to my biscuits because to me that would be a scone not a biscuit
I will post a pic next time a bake a batch