First Step: Preheat Oven and Prepare Pan. Set your oven temperature to 350°F (175°C). Grease an 8×4-inch or 9×5-inch loaf pan lightly with oil or line with parchment paper for easier removal. This step ensures your bread cooks evenly and doesn’t stick.

Second Step: Mix Dry Ingredients. In a medium bowl, whisk together 1 ½ cups all-purpose flour, 2 teaspoons cinnamon (if using), ½ teaspoon baking soda, ½ teaspoon baking powder, and ½ teaspoon salt. This combines the leavening agents and spices uniformly throughout the bread.

Third Step: Combine Wet Ingredients. In a larger bowl, beat 2 large eggs with ½ cup vegetable oil, ¾ cup packed brown sugar, ¼ cup granulated sugar, and 1 teaspoon vanilla extract until smooth and creamy. These ingredients build the base of moisture, sweetness, and flavor.

Fourth Step: Blend Wet and Dry Mixtures. Gradually add the dry ingredient mixture into the wet mixture, stirring gently just until combined. Avoid overmixing, which can lead to a dense texture rather than a light and fluffy bread.

Fifth Step: Fold in Zucchini and Blueberries. Fold 1 ½ cups shredded zucchini into the batter carefully until evenly dispersed. Toss 1 cup fresh blueberries with ¼ cup flour separately to coat and prevent sinking, then gently fold them into the batter to distribute the fruit evenly without breaking.

Sixth Step: Pour Batter and Bake. Transfer the batter into the prepared pan, smoothing the top with a spatula. Optionally, sprinkle extra blueberries on top for decoration. Bake for 50 to 65 minutes (50-60 minutes for a 9×5-inch pan, 55-65 for an 8×4). Check doneness by inserting a toothpick into the center; it should come out clean or with a few moist crumbs. If the top browns too fast, tent it loosely with foil after 40 minutes to prevent burning.

Final Step: Cool and Serve. Allow the bread to cool in the pan for 15 minutes before transferring it to a wire rack to cool completely. Slice and serve fresh or store for later. This bread can be enjoyed warm or at room temperature, making it a versatile addition to your baking repertoire.