"(as|) American as apple pie" 的定义和意义

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

The idiom "American as apple pie" originated in the United States and encapsulates the notion of apple pie as a quintessential and traditional American dessert. The phrase became popular in the 20th century, symbolizing a sense of patriotism, nostalgia, and cultural identity. It reflects the widespread association of apple pie with American values and traditions, often used to express something that embodies the essence of American culture.