Preheat oven to 375ºF (190ºC).
Grease or line a baking sheet with parchment paper.
In the food processor: place 2 ¼ cups all-purpose flour, ⅓ cup light brown sugar, 1 tablespoon baking powder, dash of ground cinnamon and ⅛ teaspoon salt in the bowl and process a few seconds to mix.
Scatter ¾ cup unsalted butter, very cold, over this mixture and add ½ teaspoon orange zest. Pulse a few times until the butter is the size of peas or chickpeas. Transfer mixture to a large bowl.
By hand: in a large bowl lightly mix 2 ¼ cups all-purpose flour, ⅓ cup light brown sugar, 1 tablespoon baking powder, ⅛ teaspoon salt and dash of ground cinnamon.
Add ¾ cup unsalted butter pieces and ½ teaspoon orange zest, and integrate it with your hands or a pastry cutter. The butter should be the size of peas or chickpeas.
For both: drizzle ½ cup whole milk (and sour cream if using both) and quickly stir to mix with a fork, until most of it is moistened.
Add ⅔ cup dried cranberries and mix a few times. The dough should come together if pressed but appear lumpy.
Dump this shaggy mass onto the kitchen counter or smooth surface and quickly give it a few turns to avoid very dry spots. Some dry parts might remain and that is OK. The more you touch it and mix it, the tougher the baked scones will be.
Pat the mixture into a round, about 1-inch high. With a kitchen knife or dough scraper, cut scones into 6 triangles and arrange them on the baking sheet. For smaller scones, cut each half in four for a total of 8 wedges. At this point, you can freeze the unbaked triangles and bake them directly from the freezer.
Bake for about 20 minutes, until tops are golden brown and risen.
Eat warm or let cool completely and drizzle with orange glaze.