A little something I do for my staff on the last day of work before Christmas: eggnog at 10 am on Christmas Eve. The calendar invite is half the fun. This year's shortlist: "Johnny's Boozy Eggnog – Festive Team Alignment Session", "Johnny's Boozy Eggnog & Questionable Decisions" and "Johnny's Boozy Eggnog (Coffee Available for Plausible Deniability)".
The brief was elegant and sophisticated, not too sweet, and boozy. The first version came from ChatGPT, so it went through the full three-way blind review (Claude, Grok and Codex) in October 2026 with no limits, and this is the winner. It hasn't been made in this exact form yet.
What changed, and why. It's a cooked custard, taken to 80°C and iced straight down, with no raw egg whites: right for a workplace and an Adelaide summer. Pure cream, not thickened cream; the gums in thickened cream make a cold custard slippery. 120 g of sugar, not 150. A vanilla bean and a blade of mace in the milk, with no ground cinnamon, and the nutmeg grated fresh onto every glass, because that smell is most of what people remember.
The spirit: Pierre Ferrand Ambre cognac leads, for apricot, flower and a dry finish, with Wild Turkey 101 for push through the cream and Appleton Estate 12 for perfume. Every glass is 90 ml of custard and 30 ml of spirit, so every glass is the same strength, and a day in the fridge rounds the alcohol off. If you can't get the Ferrand, use St Agnes Bartender's Cut from Renmark rather than another cognac: richer, more Christmas cake, and a touch stronger.
How strong: about 11% alcohol, roughly one standard drink per 120 ml glass (1.1 with the St Agnes). That's at 10 am at work, so it's one glass to start, the alcohol-free jug sits right beside it, and coffee doesn't make anyone sober.
The alcohol-free jug is the same custard, poured off before any spirit is near it, loosened with milk and cream so it isn't sweeter or thicker than the boozy one. It is still egg and dairy. Anyone pregnant should know it's a custard cooked to 80°C, not a raw nog; use pasteurised yolks if someone vulnerable will drink it, and still cook them.




