This glow-in-the-dark Halloween punch is both a trick and a treat

In my never-ending quest to make your cocktails more sophisticated, I’m here to urge you to consider a neglected drink ingredient. No, I’m not talking about singani or sotol or shōchū —though yes, you should be exploring those spirits.

I’m talking about riboflavin! That’s right, riboflavin, a.k.a. vitamin B2, your ally against migraines and cataracts that comes in both liquid and powdered forms, and has a mild, grassy bitterness that pairs beautifully with —