The holiday season is in full swing, and the dairy aisles of grocery stores are once again stocked with one of my personal favorite Christmas delicacies: eggnog. Normally, I'm a creature of habit.

There are organic, dairy-free, lactose-free, extra-creamy and reduced-fat versions; it’s also the essence of flavored extracts, cookies and coffee creamers. There are eggnog flavors, too ...