I have vague memories of a Peanut Butter hard candy called “Duets” from my youth, but when I went to search for it online, the results were unexpected. I found a commercial for an “Adults Only” candy called “Duets” that was basically raisins or peanuts coated in yogurt. This was not the candy I was looking for, but this commercial intrigues me (as do most anything trying to say they are for “adults”.)