Place the shredded zucchini in a strainer over the sink, sprinkle lightly with salt, and let it drain for 1 hour. Squeeze out as much excess water as you can using your hands to keep the muffins perfectly fluffy.
Preheat your oven to 350°F and line a 12-cup muffin pan with parchment or silicone liners.
In a large bowl, whisk together the coconut flour, sweetener, protein powder, baking powder, cinnamon, salt, and cloves.
Stir in the squeezed zucchini, eggs, melted butter, and 3 tablespoons of water. Mix well. If the batter feels too thick, add one more tablespoon of water—it should be easy to scoop but not runny.
Fold in your chopped nuts or sugar-free chocolate chips.
Divide the batter evenly among the muffin cups and bake for about 25 minutes, until the tops are golden brown and springy. Let them cool in the pan and enjoy!