What can go wrong making Banana Bread
Bananas, thankfully, do not all come in uniform sizes so you may need to adjust the mixture with small amount of water if it looks too dry or tiny bit more flour of too wet. What you are looking for is a nice thick cake batter
Also, don't be tempted to take it out of the oven too soon. The outside may get a little dark but you need to give the inside plenty of time to cook otherwise you end up with a wet and stodgy bread.