01 -
Set oven to 325°F and allow it to preheat completely before preparing the batter.
02 -
Peel one medium zucchini and shred evenly using the large holes of a box grater. Do not squeeze out the liquid.
03 -
In a large mixing bowl, whisk together the eggs, granulated sugar, sourdough discard, shredded zucchini, oil, and vanilla extract until smooth and fully blended.
04 -
Add all-purpose flour, baking soda, salt, and ground cinnamon to the bowl. Stir gently until just combined. Do not overmix.
05 -
Pour the batter into a greased or parchment-lined standard loaf pan. Smooth the top with a spatula.
06 -
Place the pan in the center of the oven and bake for about 60 minutes. Test for doneness by inserting a toothpick in the center—it should come out clean.
07 -
Leave the loaf to cool in the pan for 10 minutes, then remove and set on a wire rack until fully cooled before slicing.