Start by preheating your oven to 400°F (200°C) and lining a baking sheet with parchment paper, setting it aside for later use.
In a spacious mixing bowl, whisk together the flour, sugar, baking powder, and salt. Take the frozen butter and grate it directly into the flour mixture, using a pastry blender or fork to blend until the mixture resembles coarse crumbs. For optimal results, place this mixture in the refrigerator while you prepare the wet ingredients.
In a separate small bowl, whisk together the sour cream, heavy whipping cream, egg, vanilla extract, and orange zest until well combined. Pour this wet mixture into the flour blend, gently stirring until the ingredients are just moistened and starting to come together.
Gently fold in the cranberries, ensuring even distribution. Flour or lightly grease your hands and carefully bring the dough together, then transfer it onto a floured surface. Press or lightly roll the dough into a round, approximately 1 inch in thickness.
Slice the dough circle into 8 equal wedges and arrange them on the prepared baking sheet. Lightly brush the tops of each scone with a bit of heavy cream. Bake for 15-18 minutes, or until they reach a light golden color.
Once baked, remove the scones from the baking sheet and allow them to cool for about 10 minutes. During this time, prepare the glaze by mixing the powdered sugar with the freshly squeezed orange juice until smooth. Adjust with more juice or powdered sugar as needed for your desired drizzling consistency. Drizzle over the cooled scones, and enjoy these fragrant, freshly baked treats.