01 -
Heat oven to 425° Fahrenheit.
02 -
Line a small baking sheet with parchment paper or a nonstick baking mat.
03 -
In a large mixing bowl, stir together the flour, baking powder, baking soda, and kosher salt.
04 -
Use a pastry cutter to cut the cold butter pieces into the dry ingredients until the mixture is coarse and sandy.
05 -
Add cold milk to the flour mixture and stir until everything is just combined. The dough should be crumbly, shaggy, and loose.
06 -
Lightly flour a cutting board and tip the dough onto the floured surface. Gently pat the dough together until it holds its shape. Fold it over itself several times and pat it into a 1-inch thick square.
07 -
Cut the dough into quarters using a sharp knife.
08 -
Place the biscuits on the prepared baking sheet, leaving 1–2 inches of space between each one. Bake at 425°F for 10–12 minutes or until golden brown.