Preheat your oven to 375˚ and line or grease a 12 muffin pan.
In a large bowl, combine the flours, baking soda, powder, cardamon, and orange zest. Give a quick stir.
In a separate bowl, whisk together egg, milk, melted butter (that has been slightly cooled), and maple syrup. Pour in to dry ingredients, add fruit if using, and stir until barely combined
Portion out evenly among the muffin tin. This recipe makes some bigger muffins so be generous on your scoop! Bake for 15-18 minutes until muffin springs back and is golden brown.