Preheat your oven to 450°F (about 232°C).
Line a baking sheet with parchment paper or lightly butter it to prevent sticking.
In a large bowl, whisk together the flour, baking powder, sugar, salt, and baking soda.
Keep them ready for the next step.
Cut the cold butter into small cubes.
Mix it into the flour mixture using your fingers or a pastry cutter until it resembles coarse crumbs.
Add the buttermilk to the mixture.
Stir gently just until the dough comes together.
Be careful not to overmix it.
Turn the dough onto a floured surface.
Gently pat it to about 1/2-inch thickness without kneading too much.
Cut out rounds using a 2-inch biscuit cutter.
Place them on the prepared baking sheet.
Bake in the preheated oven for about 12 to 15 minutes or until golden brown.
Remove them and let them cool for a moment before serving.