Preheat oven to 400°F. In a mixing bowl with a paddle attachment, whisk together flour, baking powder, baking soda and salt. Combine well.
In an separate bowl, whisk together the sugar, milk, orange juice, orange zest, vanilla, coconut and oil until well blended. Add the liquid mixture to the dry ingredients and mix on speed 1 for 2 minutes. Scrape down bowl and continue to mix again on speed 1 for several minutes.
Mix remaining sugar and coconut ingredients together - this will go on top of muffins after scooping. In a prepared muffin pan, fill each cup with batter. Take sugar/coconut mixture and sprinkle approximately 2 tsp on top of each muffin. Bake for approximately 15 - 20 minutes, or until a toothpick inserted comes out clean.