1. Line 2 baking sheets with parchment paper or a Silpat and set aside.
2. In a small bowl, mix yeast with the warm water. Stir together and let sit for 5 minutes. Stir in warm buttermilk, and set aside.
3. In a large bowl, combine 5 cups of flour, sugar, salt, baking powder, and baking soda. Using a pastry cutter or fork, cut in the cold butter until you get a coarse, sand like texture. Using a wooden spoon, stir in yeast mixture.
4. Move dough to a lightly floured surface and knead for a minute or so. Add more flour, if needed. Dough should be soft and slightly sticky.
5. With a rolling pin, roll out dough to about 1-inch thick. Using a 3 inch cookie cutter, cut out biscuit dough and place 2 inches apart on prepared baking sheets. Cover with kitchen towels, and let rise in a warm place until almost doubled, 10-15 minutes.
6. Preheat oven to 450 degrees while biscuit dough is rising. Bake for 8-10 minutes, or until lightly golden brown. Brush with melted butter right out of the oven and devour.
1. Using a stand mixer with either the paddle or whisk attachment, beat butter, powdered sugar, and salt until light and fluffy, 1-2 minutes.
2. Add strawberries and beat until well combined, but you can still see bits of the strawberries.
3. Transfer to a small bowl and chill until ready to serve. You can also lay butter into plastic wrap and roll into a log shape, freeze and cut into spies when ready to serve.