First Step: Prepare Your Equipment and Oven Preheat your oven to 350°F (175°C). Grease an 8×4 inch or 9×5 inch loaf pan with butter or nonstick spray, or line it with parchment paper. Choosing an 8×4 inch pan will give you a domed top, while a 9×5 inch pan allows a flatter loaf. This preparation ensures even baking and easy removal.

Second Step: Mix Dry Ingredients In a medium bowl, combine 1 ½ cups all-purpose flour, ½ teaspoon baking soda, ½ teaspoon baking powder, ½ teaspoon salt, and 2 teaspoons cinnamon. Whisk them together until thoroughly blended to distribute the leavening agents and spices evenly throughout the flour. This step is essential for uniform texture and flavor.

Third Step: Beat Wet Ingredients In a large mixing bowl, beat together ½ cup vegetable oil, ¾ cup packed brown sugar, ¼ cup granulated sugar, 2 large eggs, and 1 teaspoon vanilla extract until smooth and well combined. The brown sugar adds moisture and depth of flavor while the eggs support structure. This mixture should be creamy and well emulsified.

Fourth Step: Incorporate Zucchini Fold 1 ½ cups freshly shredded zucchini directly into the wet mixture. Do not squeeze out the moisture from zucchini; this natural liquid helps keep the bread moist and tender. Adding zucchini at this point will loosen the batter slightly but increases moisture and nutrition.

Fifth Step: Combine Wet and Dry Ingredients Gradually stir the dry ingredient mixture into the wet batter, mixing just until a thick batter forms. Overmixing can lead to dense bread. The batter should be thick but not dry. Then, gently fold in 1 cup blueberries, either fresh or thawed and drained if frozen, taking care to avoid crushing them. This technique helps prevent the blueberries from sinking to the bottom during baking.

Sixth Step: Bake the Bread Pour the batter evenly into the prepared loaf pan and smooth the top using a spatula. Place it in the preheated oven and bake according to the pan size:

• 9×5 inch pan: 50 to 60 minutes
• 8×4 inch pan: 55 to 65 minutes

Test for doneness by inserting a toothpick in the center; it should come out clean or with just a few moist crumbs. If not ready, bake a few minutes longer and test again. Baking time might slightly vary for vegan or gluten-free variations.

Final Step: Cool and Serve Remove the bread from the oven, let it cool in the pan for about 10 minutes, then transfer it to a wire rack to cool completely before slicing. This cooling step allows the bread to set and prevents it from crumbling when cut. Serve plain, or optionally with a spread of butter, cream cheese, or a dusting of powdered sugar.