Preheat oven to 425 degrees F. Place a sheet of parchment paper on a large baking sheet and set aside.
In a large mixing bowl, whisk together the flour, sugar, salt, baking powder, baking soda, and salt. Whisk until combined.
Add the cold cubed butter to the flour mixture. Using a pastry cutter, two knives, or your fingertips, work the butter into the flour mixture until it resembles coarse crumbs. This step is crucial for creating flaky layers in your biscuits.
Make a well in the center of the flour mixture and pour in the cold buttermilk. Stir gently with a wooden spoon or spatula until the dough starts to come together. Be careful not to overmix, as this can lead to tough biscuits.
Turn the dough out onto a lightly floured surface and Pat or roll the dough out to about ¾-inch thickness.
Using a round biscuit or cookie cutter (about 2 to 2.5 inches in diameter), cut out the biscuits by pressing straight down without twisting the cutter. This ensures that the biscuits rise evenly. Re-roll the scraps and continue cutting out biscuits until all the dough is used up. It should make between 8 to 10 biscuits.
Place the biscuits on the prepared baking sheet, spacing them about 1 inch apart. For softer biscuits with more tender edges, you can place them closer together so they're touching.
Brush the tops of the biscuits with a little extra buttermilk. This will help them develop a beautiful golden-brown color as they bake.
Bake the biscuits for 12-15 minutes, or until they're golden brown and have risen nicely. You can check for doneness by inserting a toothpick into the center of a biscuit; it should come out clean or with a few crumbs clinging to it.
Remove the biscuits from the oven and immediately brush the tops with the melted butter. This adds extra flavor and keeps the tops soft.
Let the biscuits cool on the baking sheet for a few minutes before transferring them to a wire rack to cool slightly. Serve warm with butter, honey, jam, or your favorite biscuit toppings.