Preheat the oven to 420 Degrees.
Mix the all-purpose flour, baking powder, salt, and sugar together in a food processor. Pulse until combined.
Add the cubed butter into the processor and pulse until crumbs form. Then pour the crumbs into a mixing bowl.
Pour the buttermilk over the crumb mixture and mix slightly until combined. Sprinkle a bit of flour on a separate work surface. Move the dough to the work surface and mold dough until it is 1/2 inch thick. Cut into 3-4 inch circles by using a cookie cutter or cup. Re-roll and continue to cut into the 1/2 inch thick 3-inch circles until you have 6 biscuits.
Arrange the biscuits to a parchment paper lined baking sheet. Bake for 15-20 minutes until tops are golden brown. Remove from oven and allow them to cool for 10 minutes.
Stir the strawberries and the granulated sugar together in a bowl.
Beat the heavy cream, vanilla and sugar together for about 3 minutes on high speed.
Cut the biscuits in half and layer with the strawberries and whipped cream. Add a sprinkle of brown sugar on top. Serve.