01 - Preheat the oven to 400°F and line a baking sheet with parchment paper.
02 - In a large bowl, whisk together flour, sugar, baking powder, salt, and orange zest until well blended.
03 - Add the cold butter cubes and cut into the dry mixture using a pastry cutter or your fingertips until the mixture resembles coarse crumbs with some pea-sized butter pieces remaining.
04 - In a small bowl, whisk together the heavy cream, egg, and vanilla extract until smooth.
05 - Pour the wet mixture over the flour mixture. Stir gently with a spatula or wooden spoon until just combined. Do not overmix.
06 - Gently fold in the dried cranberries and nuts (if using) until evenly distributed throughout the dough.
07 - Turn the dough onto a lightly floured surface. With floured hands, gently pat into a 1-inch thick circle, approximately 7 inches in diameter.
08 - Cut the circle into 8 equal wedges using a sharp knife or bench scraper. Transfer wedges to the prepared baking sheet, spacing 2 inches apart.
09 - Lightly brush the tops of each scone with additional heavy cream. Bake for 18-20 minutes until golden brown on top and a toothpick inserted in the center comes out clean.
10 - Transfer scones to a wire rack and let cool for at least 15 minutes before glazing.
11 - In a small bowl, whisk together powdered sugar, 2 tablespoons orange juice, and orange zest. Add additional orange juice 1 teaspoon at a time until desired drizzling consistency is reached.
12 - Drizzle the glaze over the cooled scones. Allow glaze to set for 5 minutes before serving.