01 -  Preheat oven to 350°F. Line a 12-cup muffin tin with paper liners or lightly grease each cup. 
 02 -  In a large mixing bowl, whisk together whole wheat flour, protein powder, baking powder, baking soda, salt, and ground cinnamon until evenly combined. 
 03 -  In a separate bowl, beat eggs thoroughly. Incorporate applesauce, honey or maple syrup, melted coconut oil or light olive oil, and vanilla extract, mixing until fully integrated. 
 04 -  Gently fold the wet ingredients into the dry mixture just until combined. Ensure not to overmix to maintain muffin tenderness. 
 05 -  Delicately fold in grated zucchini and nuts, if using, ensuring even distribution. 
 06 -  Distribute the prepared batter evenly among the muffin cups. 
 07 -  Bake in preheated oven for 18 to 22 minutes, or until a toothpick inserted in the center of a muffin emerges clean. 
 08 -  Allow muffins to cool in the pan for 5 minutes. Transfer to a wire rack and let cool completely before serving.