It depends on the recipe. Replacing egg with banana in muffins, where you mainly need it for the moisture? Works fine.
Replacing egg with banana in a custard, where you need it as a binding agent and stiffener? Won’t work.
Replacing egg white with banana in a meringue? What are you even doing?
Replacing egg white with banana in a meringue? What are you even doing?
Having read more than one discussion column on recipe sites, I would not put it past some people. They would first complain that there are no instructions on how to separate a banana, then that whisking it does not produce something resembling a beaten egg white, and finally that baking it produces something not even close to meringue. Ah, yes, and because they added the amount of sugar given in the recipe, they’ll finally complain about the result being overly sweet.
It depends on the recipe. Replacing egg with banana in muffins, where you mainly need it for the moisture? Works fine.
Replacing egg with banana in a custard, where you need it as a binding agent and stiffener? Won’t work.
Replacing egg white with banana in a meringue? What are you even doing?
Having read more than one discussion column on recipe sites, I would not put it past some people. They would first complain that there are no instructions on how to separate a banana, then that whisking it does not produce something resembling a beaten egg white, and finally that baking it produces something not even close to meringue. Ah, yes, and because they added the amount of sugar given in the recipe, they’ll finally complain about the result being overly sweet.
They then leave a 1 star because the recipe was awful.