This is my Oma's recipe.
She always grates her zucchini. My Mum makes the cake cheap, with margarine.
We use up our gargantuan zucchinis this way. The ones Opas and neighborly neighbors press on us. The homesteader in them wants to grow and eat these giants - never mind that they don't taste good past six inches, and spoil quiches and stir-frys at every opportunity. The sheer bulk.
(The homesteader in me wants to make them into something gourmet, and unrecognizable above all. A kind of vegetal mock duck.)
It is always delicious. The first time I tried to serve it to Tim, he was dubious. No longer.
1/2 cup butter
1 and 1/2 cups sugar
1 teaspoon vanilla
1/2 cup soured milk
Stir in together
2 and 1/2 cups flour
4 tablespoons cocoa
1/ teaspoon baking soda
1/2 teaspoon cloves or allspice
1/2 teaspoon cinnamon
2 cups pureed zucchini
1 cup chocolate chips
Bake in a greased 9 x 12-inch pan, or cupcake tins, at 350 degrees F, until a fork comes out clean (40-50 minutes for cake, 15-30 minutes for cupcakes)