Preheat oven to 350 degrees F. Line a 8x4 inch baking pan with parchment paper and/or spray with nonstick cooking spray.
Make the flax egg by mixing 1 tablespoon of flaxseed meal + 3 tablespoons of water in a small glass or bowl. Place in the fridge for 5 minutes so that it thickens up.
Next squeeze your shredded zucchini of excess moisture with a paper towel or cheesecloth then place shredded zucchini in a large bowl. Mix in the flax egg, sunflower butter, maple syrup, vanilla extract, apple cider vinegar and milk until well combined.