Preheat oven to 350. Line a baking dish with aluminum foil and spray with cooking spray.
Grate zucchini into a bowl, mix in peanut butter (this will be a little tough, so you can put some muscle in :) )and then egg, sugar, vanilla and baking soda, stir. Then add chocolate chips and combine.
Spread into baking dish, bake for 20-25 minutes until only slightly soft on the insides. Then allow to cool for an hour, then remove aluminum foil from pan, place on a cutting board, and cut into 16 squares and enjoy