- Preheat oven to 165º C.
- Heat coffee, cocoa, butter and milk on hob at medium heat until smooth cream.
- Remove from heat.
- Add vanilla to mixture.
- Leave to cool.
- Beat eggs, sugar and salt in a bowl for 10 minutes until frothy.
- Slow beater speed.
- Add cream of cocoa milk to mixture.
- Keep beating.
- Add sour cream and flour to mixture and keep beating.
- Add baking powder and baking soda to mixture and keep beating.
- Beat until blended.
- Add bananas and chocolate to mixture and mix in.
- Grease a 28 cm ring tin or two loaf tins
- Sprinkle 2-3 tablespoons sugar onto greased surfaces of baking tin(s).
- Pour mixture into tin(s).
- Bake at 165º C; 50-60 minutes in a ring tin and 40-45 minutes in loaf tins
- Cool for 15 minutes on a rack.