For the zucchini cake with hazelnuts and sugar icing grate the nuts and grate the zucchini.
Mix butter, eggs, sugar, flour, baking powder and cinnamon to a dough, mix in hazelnuts and zucchini and pour the dough into a greased cake springform pan and put it into the cold oven.
Bake at 175 degrees Celsius for 50 to 60 minutes.
In the meantime, for the frosting, mix the powdered sugar and lemon juice.
After cooling, spread the zucchini cake with hazelnuts and frosting with the frosting and let dry until serving.