Preheat oven to 350°F. Place cupcake liners in a muffin pan.

Mix dry parts collectively in a giant bowl; put apart.

Mash bananas with a fork and heat oil merely until melted (be careful to not over-heat).

In a separate bowl, combine the eggs, oil, yogurt, and banana.

Add moist parts to the dry parts and stir merely until moistened. Evenly distribute batter into muffin cups.

Combine the coconut and walnuts in a small bowl, then sprinkle over each muffin.

Bake for 15-20 minutes until a toothpick inserted into the center of a muffin comes out clear.