Preheat oven to 350. Line baking sheet with parchment paper.
Grate zucchini and squeeze in stacks of paper towels until most of the moisture is squeezed out. (This might take several rounds of paper towels.)
Mix zucchini, flour, oats, cornstarch, cinnamon, salt, and baking soda. Stir well. Add butter, water, and honey. Stir until well combined. Fold in raisins. Drop by rounded tablespoons onto a parchment lined baking sheet. Flatten slightly.
Bake at 350 for 10-12 min. Let stand 2-3 min before removing to a cooling rack.