Jimmy Fallon killed as an Emmy Awards host and sang a faux-folkie duet with the Boss himself, but how do we know he's truly arrived? He's inspired a Ben & Jerry's ice-cream flavor. Following in the footsteps of the sweet-toothed, brand-loving Stephen Colbert, Fallon has spawned Late Night Snack, a gooey confection with potato chips, caramel swirl and fudge in vanilla bean ice cream. More like Late Night Stoner Snack, yeah? The dessert, which came about through a deal between NBC's consumer products division and Ben & Jerry's, starts hitting stores this week. The marketer had already been mulling a potato chip mix-in when Fallon and his house band, the Roots, played an original song about Ben & Jerry's treats as the fictional group Ladysmith Snack Mambazo. (Those guys really like their junk food—they previously sang an ode to Hot Pockets.) From that in-show ad sprang a piece of licensed swag. Late Night Snack joins Colbert's Americone Dream as the only other flavor to be based on a wee-hours chat show; expect Fallon, his musicians and guests to eat lots of it in the coming days.