Preheat oven to 400 degrees F.Blend orange and orange juice in blender until smooth. Then blend in melted butter and egg. Set aside.In a large bowl, mix all remaining dry ingredients together, then add the blended wet mixture. Stir until just moistened.Drop into greased or paper-lined muffin cups, filling each ¾ full.Bake at 400 degrees F for 18-20 minutes.