Adjust oven rack to middle position and heat oven to 450°F.
Whisk flour, baking powder, baking soda, sugar, and salt in large bowl.
Combine cold buttermilk and 8 tablespoons melted butter in a medium bowl, stirring until butter forms small clumps.
Add buttermilk mixture to dry ingredients and stir with a rubber spatula until just incorporated and batter pulls away from sides of the bowl. The dough will be stiff, not wet. If it is wet, add flour, 1 tablespoon at a time.
At this point, you can make drop biscuits or you can roll the dough and make cut out biscuits.
I like cut-out biscuits. Gather dough and place on a floured surface. Knead the dough a couple of times and roll or pat dough into a square approximately 1 inch thick. Cut into squares, you should have about 8 biscuits. For a flakier biscuit. Gather dough and roll dough into a square and then fold the dough over in thirds, you will have a rectangle now then roll dough into a 1-inch thick square.
Bake 10-18 minutes until tops are a nice golden brown. Start checking at 10 minutes.
Brush biscuit tops with remaining 2 tablespoons melted butter. Transfer to wire rack and let cool 5 minutes before serving.
Get out your favorite jam and EAT as MANY biscuits as you want. I know I will.
