01 - Preheat the oven to 400°F. Line a baking sheet with parchment paper.
02 - In a large bowl, whisk together flour, sugar, baking powder, baking soda, and salt.
03 - Add cold, cubed butter to the dry ingredients. Use a pastry cutter or fingertips to work butter in until mixture resembles coarse crumbs.
04 - Stir dried cranberries into the crumbly mixture.
05 - Whisk buttermilk and egg in a separate bowl. Pour into dry ingredients and gently mix until just combined, avoiding overmixing.
06 - Turn dough onto a lightly floured surface and pat into a 1-inch thick round.
07 - Cut the dough into 8 wedges and place them on the prepared baking sheet.
08 - Brush scone tops with milk or cream and sprinkle with coarse sugar if desired.
09 - Bake for 16 to 18 minutes or until golden brown and cooked through.
10 - Allow scones to cool slightly before serving.