Grate the zucchini finely. It is not necessary to peel the zucchini, but wash off of course.
Mix the dry dough ingredients in a bowl. Mix in the oil and zucchini grated and stir until a viscous mixture is formed. Pour the mixture into a greased, deep baking sheet and smooth it out.
Bake at 180 ° C (top / bottom heat) in a preheated oven for about 20-25 minutes. Let cool in the mold.
If you like, you can coat the brownies with couverture or just dust them with powdered sugar.