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 evenly blended.
03 - Add cold butter cubes and cut into the dry mixture using a pastry cutter or fingertips until the mixture resembles coarse crumbs with some pea-sized pieces remaining.
04 - In a small bowl, whisk together cream, egg, and vanilla extract until combined.
05 - Pour the wet mixture over the flour mixture. Stir gently with a spatula until just barely combined. Do not overmix.
06 - Gently fold in dried cranberries and nuts if using. Handle minimally to maintain tenderness.
07 - Turn dough onto a lightly floured surface. Pat gently into a 1-inch thick round disk, about 7 inches in diameter.
08 - Cut the disk into 8 equal wedges. Transfer to the prepared baking sheet, spacing 2 inches apart.
09 - Lightly brush the tops of each scone with additional heavy cream for golden browning.
10 - Bake for 18-20 minutes until golden brown on top and a toothpick inserted in the center comes out clean.
11 - Transfer scones to a wire rack and let cool completely before glazing.
12 - Whisk together powdered sugar, orange juice, and orange zest until smooth and pourable. Add more juice if needed for desired consistency.
13 - Drizzle the orange glaze generously over the cooled scones. Allow glaze to set for 5 minutes before serving.