the.com/peanut brittle

means A hard, flat candy made by cooking sugar and corn syrup to a caramelized crack-hard finish and studding it with peanuts.

from 'Brittle' describes exactly what it is — a sugar syrup boiled past the 'hard crack' stage so it sets into thin, glassy sheets that shatter rather than bend, a plain old English word for easily broken. The peanut version is an American tradition, with home cooks and candy makers in the 19th and 20th centuries pouring molten sugar over roasted peanuts before it hardens, giving the candy its name simply by describing what's in it and what it does to anyone who bites down carelessly.