Sift the all-purpose flour, whole wheat flour, cane sugar, brown sugar, salt, baking power, baking soda, ground cinnamon, nutmeg, and all-spice into a bowl and set aside (basically all of the dry ingredients except for the zucchini and walnuts).
Then mix all the wet ingredients in a separate bowl: vegetable oil, almond milk, water, and vanilla.
Slowly pour the wet mixture into the dry one, and combine (being careful not to overmix).
Once batter is made, stir in the grated zucchini and walnuts.
Then, pour the batter into a 5x7x4 inch bread pan, or into 2 pans that are 2.5x9.5x6 inches.
Bake for 1 hour and 55 minutes to 2 hours (if it's in the larger bread pan; if divided into two pans bake for half the time). Once knife comes out clean, cool for about 20 minutes, slice, and serve!
You don't have to add nuts to your zucchini bread if you don't want to. However, I highly recommend you do because it adds a nice nutty flavor and gives a good texture to your bread.