Step 1: Preheat your oven to 350°F (175°C).
Step 2: Line your muffin tin with muffin liners or spray it with non-stick spray.
Step 3: In a large mixing bowl, whisk together the all-purpose flour, baking soda, baking powder, salt, ground cinnamon, and ground cloves (if using).
Step 4: In another bowl, beat the eggs and then add the sugar, oil, and vanilla extract. Mix until well combined.
Step 5: Grate the zucchini and optionally squeeze out excess moisture.
Step 6: Add the grated zucchini to the wet mixture, and stir to combine. Gradually fold in the dry mixture until just combined.
Step 7: Scoop the batter into the prepared muffin tin, filling each cup about two-thirds full.
Step 8: Bake for 20-25 minutes, or until a toothpick comes out clean.
Step 9: Let muffins cool in the pan for 5 minutes before transferring to a wire rack.