For best results, grate the zucchini yourself and squeeze out excess moisture with a clean kitchen towel to prevent a soggy cake.
You can substitute buttermilk with regular milk mixed with 1 tablespoon of lemon juice or vinegar.
This cake stores well covered at room temperature for up to 3 days, or in the refrigerator for up to a week.
For a richer flavor, substitute the vegetable oil with melted butter.