Preheat your oven to 450 degrees F. Line a large baking sheet with parchment paper and set aside.
In a large bowl, mix together the flour, baking powder, salt and sugar. Cut the butter into the dry ingredients using a small knife. With a pastry blender or large fork, incorporate the butter until the mixture looks like coarse crumbs.
Pour in the buttermilk a little at a time and continue to mix with a fork until the dough comes together. Turn the dough onto a floured work surface and gently and briefly pack it together with your hands. Flour the top of the dough and roll it out with a rolling pin until 1/2 inch thick. Cut with a circular biscuit cutter or cookie cutter. Arrange on baking sheet approximately 1 inch apart. Press the remaining dough together and repeat rolling and cutting.
Bake for 10 -12 minutes or until golden brown. Optional: turn the broiler on for 2-3 minutes to make the tops extra golden and toasty. Serve while still warm.