Preheat oven to 350 degrees
Grease a 9x5 loaf pan and set aside
Using a large bowl, whisk together the sugar, salt, orange zest, flour, and baking powder until combined
Using another large bowl, mix together the buttermilk, eggs, oil, vanilla, and orange juice together
Gradually add the wet ingredients to the dry ingredients until combined, stirring well but do not whisk in or beat it in
Toss 1 cup of the cranberries together with the one Tablespoon of flour(this keeps them from sinking!)
Fold into the batter
Pour the batter into the loaf pan
Sprinkle the ½ C of cranberries on top of the batter
Bake in the oven for 60 minutes or until a toothpick comes out clean
Allow to cool completely and the slide it out of the pan