Four Main Food Groups

I'm not a Starbucks customer ordinarily but on the strongest recommendation from a friend I tried their festive offering of Eggnog Latte.  I waited well over half an hour from order to delivery in anticipation of this 'Christmas delight'.  I'm not sure how to describe the taste - sweet seems inadequate.  It did make we think of the movie Elf when Buddy says "We elves try to stick to the four main food groups: candy, candy canes, candy corns and syrup!"  I'm not tempted to repeat the experience.