Heat oven to 425 degrees and place parchment in a cast iron skillet or baking pan. Set aside
In the bowl of a food processor, combine flour, baking powder, soda and sugar. Pulse a few times to mix.
Add cubed cold butter to food processor and pulse 5-6 times until butter forms small balls. Add milk and stir until dough is shaggy.
Transfer dough to a floured surface. Bring dough togeher by hand adding more flour if needed. Pat dough in to a rectangle and fold into thirds. Rotate dough 90 degrees and repeat folding process two more times.
Pat dough int o a 1/2 inch rectangle and cut with a 3 inch round cutter. Repeat with scraps being careful not to overwork the dough
Place biscuits in skillet allowing them to touch.
Bake until golden brown, 10-15 minutes.