What is the origin of the idiom "nice as pie" and when to use it?

The origin of the phrase "nice as pie" is not definitively known, but it likely emerged from the association of pie with enjoyable experiences and positive emotions. This idiom can be used in various situations, such as when praising someone's amiable personality, referring to a person who is easy to get along with, or describing someone who consistently treats others with warmth and kindness. It is commonly used in conversations, casual writing, and storytelling to convey the notion of someone being extremely affable, much like the universally enjoyable experience of indulging in a delicious pie.