Preheat the oven to 180 °C top/bottom heat.
Mix flour with cooking chocolate. Mix eggs with oil and sugar. Mash bananas with a fork, add to eggs and mix well.
Add banana-egg mixture to flour and mix briefly.
Place paper cups in the muffin tray and fill about 2/3 full with the mixture.
Bake on the middle shelf for about 20 minutes.
Preparation Tip:
If you like, you can also use coconut oil instead of sunflower oil for the muffins. If desired, mix chopped nuts into the dough.