1Preheat your oven to 450°F (232°C).
In a large bowl, whisk together the all-purpose flour, baking powder, baking soda, and salt.
Cut the unsalted butter into small cubes and add it to the flour mixture. Use a pastry cutter or your fingers to work the butter into the flour until the mixture resembles coarse crumbs.
Make a well in the center of the flour mixture and pour in the buttermilk. Stir until just combined, being careful not to overmix.
Turn the dough out onto a lightly floured surface and gently knead it a few times until it comes together.
Roll the dough out to about 1/2-inch thickness. Use a biscuit cutter to cut out biscuits and place them on a baking sheet.
Gather the scraps, re-roll, and cut out more biscuits until all the dough is used.
Bake the biscuits in the preheated oven for 10-12 minutes, or until they are golden brown on top.
Remove from the oven and let them cool slightly before serving. Enjoy your classic buttermilk biscuits!