Execution:
Sugar + margarine (melted) + eggs + bananas (mashed into a mush with a fork) + flour + baking powder + soda + salt. Mix it well.
Grease the mold with butter.
Bake 150℃ (or 302℉) for 1 hour.
It’s hard to tell with baking becouse the archives are incomplete. For example, I did 180 degrees for 20 minutes becouse it burned. But just cover it with aluminum foil if it burns.