Preheat oven to 400 degrees and prepare baking sheet with parchment paper or silicone mat
In a food processor, add flour, baking powder, salt and sugar ** see notes
Pulse until well combined
Add butter and mix until butter is broken and mixture is coarse
Pour milk on top of flour mixture and mix just until the dough begins to form a ball
Remove dough onto lightly floured surface
Form dough into large disk
Roll dough out slowly until about 1 inch thick
Use a floured biscuit cutter to cut circles
Lightly brush with extra heavy cream or buttermilk
Sprinkle with coarse sugar
Place close together on prepared baking sheet
Bake for 15-20 minutes or until golden brown
Remove from oven onto wire rack and cool