Yes, there is such a spoon. It looks sort've like a regular spoon,
except that it has a little "hump" on the handle that fits over the rim
of a beer glass so that the draught can pour over the convex spoon. You
may be able to find one at an Irish gift shop, if you have one in your
area. Or you can do like I, I mean "a friend", did when at a bar that
serves Guiness, or other good stout beers. When the bartender is not
looking, grab the Guinness spoon that he leaves in the glass of water on
the bar. Good luck.