Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.
In a mixing bowl, whisk together the flour, sugar, baking powder, and salt until combined.
Add the chilled cubed butter to the flour mixture. Using a pastry cutter or fork, cut the butter into the mixture until it resembles coarse crumbs.
Stir in the chopped cranberries, ensuring they are evenly distributed throughout the dry ingredients.
In a small bowl, whisk together one egg, heavy cream, and vanilla extract. Pour this mixture into the dry ingredients and gently stir until just combined. Do not overmix; it’s okay if the dough is slightly sticky.
Turn the dough out onto a floured surface. Knead it gently, then pat it into a circle about 1-inch thick (2.5 cm).
Cut the dough into 8 wedges using a knife or pizza cutter. Place the scones on the prepared baking sheet.
In a small bowl, whisk the remaining egg and brush it over the tops of the scones. If desired, sprinkle turbinado sugar on top for added crunch.
Bake for 15-20 minutes, or until the scones are lightly golden on top and a toothpick inserted into the center comes out clean.
Remove from the oven and let cool on a cooling rack before serving.