Buttermilk Biscuits

Inspired by the buttermilk in the fridge. Recipe from The Gourmet Cookbook:
2 c flour
2 tsp baking powder
1/2 tsp baking soda
1/2 tsp salt
1 stick cold unsalted butter, cut into pieces
3/4 c well-shaken buttermilk, plus additional for brushing

Sift together dry ingredients. Blend in butter with your fingertips until mixture resembles coarse meal. Add buttermilk and stir just until a dough forms. Gather dough into a ball, and gently knead 6 times on a floured surface. Pat into a 1/2-inch thick round; cut out biscuits. Brush tops with buttermilk and bake at 425 degrees for 12-15 minutes.
I realized 1/2 way through that we didn't have enough baking powder, so the end result didn't rise up. Very flaky, though; despite our critique, we ate them all.
When the kids were little, biscuits were a regular on our breakfast menu--Bisquik, rolled, sandwiching sausage or bacon. Warm kitchen, smells of baking.