These fat, chewy squares of caramel and walnuts were especially popular in the ’20s, ’30s, and ’40s, but if you remember them from the ’60s or ’70s, there’s a good reason for that: “Want a Walnetto?” was often tossed out as a one-liner by dirty old man Tyrone on “Laugh-In.” They were last made by a company in California, but judging by the distinct lack of Walnettos available online today, the brand may have reached the end of its stored history.