In a small bowl, combine the flour, sugar, salt, baking powder and baking soda.
In another bowl, combine the egg, yogurt, oil and milk. Stir into dry ingredients just until moistened. Fold in cranberries and orange zest
Fill paper-lined muffin cups about three-fourths full.
Bake at 350° for 18-20 minutes or until a toothpick inserted near the center comes out clean.
Cool for 5 minutes before removing from pan to a wire rack.