Break the chocolate into pieces for the sauce. Bring the cream and chocolate to the boil while stirring and allow to cool. Whisk eggs, flour, baking powder, milk, 1/8 litre water and 1 pinch of salt. Peel and slice the bananas.
Heat some fat in a pan, pour in 1/4 of the dough, spread 1/4 of the banana slices on the dough and bake until golden brown. Turn the pancakes over and bake until golden brown as well. Fry the remaining 3 pancakes in the same way.
Arrange the pancakes with the chocolate sauce and 1 scoop of walnut ice cream. Sprinkle with cinnamon sugar.