|Sugar||As much as you like|
put the butter and chocolate together and melt them till they become liquid
put the the beaten eggs into "1"
Use the dressing sieve to put those flour and powder into "2" within several times, make sure they melt well into "2"
slice the banana and put them into "3", better keep the banana stay into it,not on top of it
pre-heat the oven to 180℃，and then put "4" into the oven and keep it heated in the temperature of 180℃ for 25mins
after that continue heating in the temperature of 150℃ for another 15mins