For the kitchen, mix cocoa, sugar, eggs and water until thick and creamy. Alternately, mix flour and oil into the mixture in a leisurely manner. Brush a large gratin dish with butter and dust with flour. Spread the dough evenly and bake in a 180 °C oven for 40 minutes. For the cream, make vanilla pudding according to package directions and cool.
Cream soft butter and stir it leisurely into the pudding. Season crem with a little lemon juice to taste.
Spread a thin layer of raspberry jelly on the cooled kitchen and top with finger-thick pieces of banana Spread the lemon cream evenly over the top. Cover with a thin chocolate glaze. Cut banana pieces into on the spot pieces.
Tip: If you brush the banana pieces with juice from a lemon, they won’t brown as quickly.
Good luck!