Preheat oven to 425°F.
In a mixing bowl, combine flour and next 5 ingredients.
Cut in butter or use a dough hook attachment, until mix resembles coarse crumb.
Stir in orange zest.
Add in orange juice then buttermilk until dough becomes just moist.
Turn dough onto lightly floured surface and knead just about a minute.
Pat or roll dough to 3/4 " thickness and cut out biscuits with a 2 1/2" biscuit cutter.
Cook biscuits on lightly greased baking sheet with a brushing of melted butter on top.
Bake for 14 minutes or until light golden brown.
While biscuits bake,combine 1 tablespoon of orange juice with powdered sugar. Let biscuits cool 5 minutes before drizzling with glaze.
Recipe by taylor68too.