Preheat oven to 375°F. Line 12 muffin cups with paper liners. Set aside. In a large bowl, stir together sugar, oil and eggs. Add zucchini and vanilla extract; stir to combine.
Sprinkle baking soda, baking powder and salt over top. Stir until well blended. Stir in flour and cinnamon; be careful not to over-mix. Fold in chopped nuts.
Divide batter evenly among prepared muffin cups. Sprinkle coarse sugar on top.
Bake for about 20 minutes, or until a toothpick inserted in a muffin comes out clean.
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Notes
You don't need to squeeze the zucchini dry before adding it to the batter. The moisture in the zucchini will keep the muffins nice and moist.
Add even more warm spices, such as ½ teaspoon nutmeg, ½ teaspoon cloves, ¼ teaspoon allspice, and ¼ teaspoon ginger.
Fold raisins or chocolate chips into the batter instead of nuts.