In a food processor mix the dates, nut butter, salt and vanilla as smooth as possible. If it really won’t blend, add a tea spoon or two and try again.
Add the popcorn to the food processor and pulse until you get a more or less chunky, depending on preference, dough. Shape the “dough” into balls, or transfer to a large piece of plastic foil , shape into a square, and cut into bars. Devour!