Why does mayonnaise act and taste the same as butter if you fry it on a grilled cheese sandwhich?

Question

My grandad taught me this trick when I was like 7 and old enough to make a grilled cheese, and it was like magic to me, and is still really, I just thought about it and I really don’t know any food chemistry so naturally brought me to reddit to seek out my tasty answer.

In: Chemistry

Answer 1

Mallard reaction.

Mayonnaise has protein and fat while butter only has fat. You still get browning with butter but you get more browning when there’s proteins present, hence why mayonnaise gives you a more toasted look and flavor