Preheat oven to 350℉ and grease loaf pans
Whisk eggs, sugar, oil, and vanilla in a bowl
In another bowl combine flour, baking soda, baking powder, salt, and cinnamon
Gently stir dry ingredients into wet mixture
Fold in grated zucchini and walnuts if using
Pour into pans ¾ full and bake 30–35 minutes for mini loaves or 60 minutes for full loaf
Test with toothpick for doneness
