01 -
Preheat oven to 175°C. Grease and flour a 23×13 cm loaf pan.
02 -
In a large bowl, whisk together the flour, cinnamon, baking soda, salt, and nutmeg.
03 -
In a separate medium bowl, whisk together the sugar, vegetable oil, eggs, and vanilla extract until well blended.
04 -
Add the wet ingredients to the dry ingredients and stir until just combined. Avoid overmixing.
05 -
Gently fold in the grated zucchini and chopped nuts, if using.
06 -
Pour the batter into the prepared loaf pan, spreading evenly.
07 -
In a small bowl, combine the flour, brown sugar, granulated sugar, and cinnamon for the streusel topping. Cut in the cold butter with a fork or your fingers until mixture resembles coarse crumbs.
08 -
Sprinkle the streusel topping evenly over the batter in the loaf pan.
09 -
Bake for 50-60 minutes, or until a wooden skewer inserted into the center comes out clean.
10 -
Let the bread cool in the pan for 10 minutes before transferring it to a wire rack to cool completely.