– 1 and 1/2 cups (190 grams) all-purpose flour (spooned & leveled) – 1 and 1/2 teaspoons ground cinnamon – 1/2 teaspoon baking powder – 1/2 teaspoon baking soda – 1/4 teaspoon ground nutmeg – 1/4 teaspoon salt – 1/2 cup (120 ml) oil (canola, vegetable, or melted coconut work well) – 1/2 cup (100 grams) brown sugar , lightly packed – 1/2 cup (100 grams) granulated sugar – 2 large eggs , room temperature – 1 teaspoon pure vanilla extract – 1 cup (125 grams) shredded zucchini , lightly packed – 1/2 cup (60 grams) chopped walnuts (optional)