Preheat the oven to 450°F (230°C).

Line a baking sheet with parchment paper.

In a mixing bowl, whisk together 2 cups all-purpose flour, 1 tablespoon baking powder, 1/2 teaspoon baking soda, and 1 teaspoon salt.

Add 1/4 cup cold cubed unsalted butter and cut it into the dry ingredients until the mixture resembles coarse meal.

Pour in 3/4 cup buttermilk and stir until just combined, being careful not to overmix.

Turn the dough out onto a lightly floured surface and roll to about 1-inch thickness.

Use a cookie cutter or sharp knife to cut biscuits and place them on the prepared baking sheet, spacing them slightly apart.

Bake for 12-15 minutes in the preheated oven until golden brown.

Remove from oven and brush tops with 2 tablespoons melted butter. Let cool slightly before serving.