Start by preheating the oven to 325°F. Grease and lightly flour two 8×4 loaf pans to prevent sticking. This step ensures the bread releases cleanly after baking and keeps the crust intact. Proper preparation makes the rest of the process smooth and easy.
In a large bowl, whisk together flour, salt, baking soda, and baking powder. This helps distribute the leavening agents evenly throughout the batter. Mixing them first ensures the bread rises consistently and has a light texture.
In another bowl, mix sugar and lemon zest together until fragrant. Then add eggs, olive oil, lemon juice, and vanilla extract. Stir until the mixture becomes smooth and well combined. This creates a flavorful base for the bread.
Gently fold the grated zucchini into the wet mixture. Then slowly add the dry ingredients and stir until just combined. Avoid overmixing to keep the bread soft and tender. The batter will be thick and slightly textured.
Divide the batter evenly between the prepared pans. Place them in the oven and bake until a toothpick inserted in the center comes out clean. The baking process allows the flavors to blend beautifully while creating a golden crust.
Allow the loaves to cool in the pans for a short time before transferring them to a cooling rack. While they cool completely, whisk together powdered sugar and lemon juice to create the glaze. Drizzle it generously over the cooled bread for a sweet, tangy finish.