Sift together the flour, salt, sugar and baking powder. Work the cubed butter into the flour mixture, until pea-sized, using a pastry cutter or a fork.
In another bowl, whisk together one egg + one egg white and the buttermilk. Set the extra yolk aside for later.
Fold the dry ingredients into the wet ingredients with a rubber spatula, then stir in the cranberries and half or your orange zest. [Your dough should be lumpy].
Place the dough on a flour surface and shape it into a ball. Press down on the ball to make the dough about 5/8 inch thick circle. Using a pizza cutter, cut the dough into 8 triangles.
Arrange the scones on a baking sheet. Whisk the leftover yolk with a couple teaspoons of water and brush the tops of the dough with the wash.
Bake for 15-18 minutes or until the tops are golden brown.
While they are cooling, make the glaze. Whisk together the melted butter, powdered sugar and the remaining orange zest. If glaze is too thick, add in a teaspoon of milk at a time until you reach your desired consistency.
Frost the tops once they are cool and enjoy with your favorite cup of coffee or tea!