Today, bananas! I was going to say that I never make banana bread but The Blob never lies. In 2017, I was apparently in the habit of buying cheap bananas and making loadsa banana-bread. So I
never rarely make banana bread; and certainly not often enough to know what are the best proportions of bananas, eggs, butter, sugar & flour. And it depends on what you mean by "best" proportions. In any case, when my pal Rene came round with a generous hand of bananas and there was no room in the fruit basket, I had to look up a recipe and try my hand again. On the don't overthink principle, I picked the top result from oogling "banana bread BBC" and modified it by throwing in a handful of sultanas. It was fine.
On the are we going to measure or are we going to cook? principle, I started to ponder what were the allowable variations in putting together bananas, eggs, butter, sugar & flour and getting a loaf [rather than soup, or soap] at the end of the process. Obviously there must be a certain amount of leeway because one banana is as long as a [very short] piece of string and the weight of an egg hardly more precise. The most scientific way of addressing the problem would be to a) move next door to an orphanage or a direct provision centre and then b) make many loaves of BB each with subtle differences in the relative amounts of the ingredients. But anothher way is to stand on the aprons of giants and see what other people have tried; presumably with success if they have floated to the top of the oogleverse. I scraped the most oogly BB recipes from the BBC and 4 more celebrity-chef recipes to make it up to N = 10: