For fake ice cream, first mash the bananas and mix well with milk, butter (room temperature), flour, sugar and baking powder. Now fill into the waffles. Put waffles on a tray and bake at 180 °C for 20 minutes.
Mix butter and cream cheese (at room temperature) and add sugar (to taste). Cool topping.
Fill into a piping bag with a star nozzle and squirt onto the cooled waffles. Decorate fake ice cream with sprinkles.