Preheat your oven to 350°F (175°C) for even baking and perfect rise.
Grease your muffin tin with coconut oil or line with muffin liners to prevent sticking.
Grate the zucchini finely using a grater. If watery, squeeze out excess moisture with a kitchen towel.
In a large mixing bowl, whisk together the eggs, melted coconut oil (or butter), granulated sweetener, and vanilla extract until well combined.
In another bowl, whisk together the coconut flour, baking powder, cinnamon, and nutmeg until lump-free.
Gradually add the dry ingredients to the wet mixture, stirring until just combined. Fold in the grated zucchini evenly.
Spoon the batter into the prepared muffin tin, filling each cup about 3/4 full to allow rising.
Bake for 20-25 minutes until golden brown and a toothpick inserted comes out clean.
Remove from oven and cool in the tin for 5 minutes, then transfer to a wire rack to cool completely.