Cooks Illustrated magazine from 2004........
has this recipe that I tried and love......
2 cups of all purpose flour
1 tablespoon double acting baking powder
1 tablespoon sugar
1/2 teaspoon baking soda
4 tablespoons cold unsalted butter cut into 1/4" cubes
1 1/2 cups cold buttermilk, preferably low fat
Set oven rack in the middle position and turn the oven to
500 degrees.
Spray a 9-inch round cake pan with cooking spray and set aside.
Spray the inside AND out of a 1/4 cup measuring cup with the cooking spray and set aside.
In a food processor, pulse flour, baking powder, sugar, salt and baking soda to combine, about 6 1-second pulses. Scatter butter cubes evenly over the dry ingredients, pulse until the mixture resembles course cornmeal. Transfer the mixture to a medium size bowl. Add buttermilk and stir until its just incorporated. (dough will be very wet and slightly lumpy)
Using the 1/4 cup measuring cup and working quickly, scoop level amount of dough and drop it onto a heavily floured baking sheet. If dough sticks to the measuring cup, pull it off with a spoon. Repeat with the remaining dough until you have 12 evenly sized balls of dough on the baking sheet.
Dust the tops of each one with flour.
With floured hands, gently pick up each dough ball and cover with flour. Shaping each one into a rough ball. Shake off excess flour and place into the prepared cake pan. Repeat this procedure with each dough ball. You should be able to get 9 balls around the edge of the pan and 3 in the middle.
Brush the dough balls with hot melted butter.
Do not flatten them.
Bake for 5 minutes at 500 degrees, reduce the oven temp to 450 and bake for about 15 minutes more until the tops of the biscuits are deep golden brown.
Cool in the pan for 2 minutes, invert onto a clean kitchen towel and then turn right side up.
Break apart and serve.
(Mine didn't start to rise until about the last 5 minutes of baking)
So far, these are the best I've made.