Vince Guaraldi Trio, but not the Peanuts soundtrack. Just his regular stuff.
It's funny, though, since mostly you head VG particularly in reference to holiday specials, even though it isn't "Christmas music" it still kind of feels a little bit jolly.
It's like someone is baking with cloves, cinnamon and nutmeg, even if it's not pumpkin pie you still think about pumpkin pie.