Banana muffins with zucchini

1 3/4 flour, e.g. half and half light spelled and wheat flour
1/4 cup cocoa
3/4 teaspoon of baking powder
1/2 teaspoon of baking soda

ADDITIONALLY:

pieces of chocolate or chocolate drops on top
Sift the flour with cocoa, powder and baking soda. Mash the bananas thoroughly with a fork, add sugar, egg and oil and mix thoroughly, e.g. with a whisk. Add the dry ingredients and mix with a spoon until combined. Finally,