Preheat oven to 425 degrees F.

In a large bowl, combine flour, sugar, salt, baking powder and soda, and whisk until combined. Using a fork, pastry blender or your hands, add butter pieces to the flour and mix until coarse little crumbles remain. Toss in cranberries. Add buttermilk and stir with a spoon until just combined, not overmixing. Use your hands if needed to bring the dough together.

Use 1/4 cup measure to drop batter onto a nonstick baking sheet, or press dough on a sheet of parchment paper or cutting board, then using a biscuit cutter to shape the dough into rounds. Bake for 12-15 minutes, or until biscuits are golden brown.