There's a particular kind of panic that sets in around month four of wedding planning. You've booked the venue. You've agonized over the guest list, cut your second cousins, added them back, cut them again.

Of all the details couples agonize over — the florals, the font on the invitation, the exact shade of the tablecloths — the signature cocktail is the one that consistently generates the most unsolicited compliments on the day. It's a small thing, done right.