Adapted from epicurious, but in a suitable batch size so I don't eat 10 at a time!
Makes 4 biscuits.
Mix together in a bowl:
1 C flour
1.25 tsp baking powder
1/3 tsp baking soda
1/3 tsp salt
Cut in and rub untill the batter looks crumbly: 1/4 C butter
Pour and mix in: 1/3 C buttermilk
Drop by spoonfuls onto baking sheet.
Bake at 400-425 for 15 minutes, or until golden but not burnt.