Start by gathering all your ingredients. Make sure your ripe mangoes are soft to the touch; this indicates they are sweet and ready for puréeing. Peel, pit, and blend them until smooth to make 1 cup of mango purée.
Preheat your oven to 350°F (175°C). This ensures your Mango Nut Bread bakes evenly and develops a lovely golden crust.
In a large mixing bowl, whisk together the all-purpose flour, unbleached whole wheat flour, sugar, baking soda, cinnamon, and salt. This helps to evenly distribute the dry ingredients.
In a separate bowl, mix the mango purée, beaten egg, and melted butter or margarine until well combined.
Pour the wet mixture into the dry ingredients and gently stir with a rubber spatula until just combined. Be careful not to overmix; a few lumps are perfectly fine!
Gently fold in the chopped walnuts and coconut flakes, ensuring they are evenly distributed throughout the batter.
Grease your loaf pan lightly with butter or non-stick cooking spray. Pour the batter into the prepared pan, smoothing the top with the spatula.
Bake in the preheated oven for 50-60 minutes or until a toothpick inserted into the center comes out clean. The top should be golden brown and spring back when lightly touched.
Once baked, remove the loaf from the oven and let it cool in the pan for about 10 minutes. Then, transfer it to a cooling rack to cool completely before slicing. Enjoy your Mango Nut Bread warm or at room temperature!