The Answer
A spaghetto
Full disclosure – the only source I could find to verify this fun-sized snack of wisdom was the Wiktionary, a crowd-sourced dictionary. Webster, Oxford and others have no listing for spaghetto.
spaghetto – Wiktionary
This revelation made the rounds on Twitter a while back, and led to an article in Bon Appetit on the subject. (all references leading back to the original source above).