Sift flour, baking powder, sugar, and salt into a large mixing bowl.
2 cups all purpose flour, 2 tablespoons baking powder, 2 teaspoons granulated sugar, ½ teaspoon salt
Add cubed butter and distribute the butter throughout using a pastry cutter or fork. Note 5.
5 tablespoons butter
Stir in rosemary.
1 tablespoon fresh rosemary
Add milk and stir until the dough forms a rough ball.
1 cup milk
Turn the dough onto a floured surface and gently pat it down into a rough rectangle about an inch thick.
Fold it over and gently pat it down again into a rough rectangle. Repeat once. Note 6.
Gently roll out the dough until it measures roughly 10 by 6 inches.
Cut dough into biscuits using a floured 3 inch diameter biscuit cutter. Note 7.
Carefully transfer the biscuits to a baking sheet, being careful to not touch the sides.
Cover the baking sheet loosely with a clean kitchen towel and place the baking sheet in the refrigerator to rest for 20 minutes. Note 8.
About halfway through the resting time, preheat the oven to 425 F (218 C).
When biscuits are done resting, remove them from the refrigerator and bake for 10 to 15 minutes until they are golden.