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.
03 - Add the cold butter and cut it in using a pastry cutter or fingertips until the mixture resembles coarse crumbs.
04 - In a small bowl, whisk together the cream, egg, and vanilla. Pour over the flour mixture and stir gently until just combined.
05 - Fold in cranberries and nuts if using. Do not overmix.
06 - Turn the dough onto a lightly floured surface. Pat into a 1-inch thick circle.
07 - Cut into 8 wedges and transfer to the prepared baking sheet, spacing apart.
08 - Brush the tops with extra cream. Bake for 18-20 minutes until golden brown. Cool on a wire rack.
09 - Whisk together powdered sugar, orange juice, and zest until smooth. Drizzle over cooled scones.