Preheat your oven to 350°F (175°C).
Line a muffin tin with parchment liners or grease it lightly.
Mash the bananas in a large mixing bowl.
Add eggs, quark cheese, Greek yogurt, honey, and vanilla to the bananas and whisk until combined.
In a separate bowl, whisk the flour, cocoa powder, salt, baking powder, and baking soda.
Gradually add the dry mixture to the wet mixture, stirring gently.
Fold in the chocolate chips.
Scoop the batter into the muffin tin, filling each about 2/3 full.
Bake for 18-22 minutes or until a toothpick comes out clean.
Cool in the tin for 5 minutes, then transfer to a wire rack.
