When it comes to holiday drinks, one clearly trumps all: eggnog, in all its frothy, creamy, decadent glory. Sure, you could go the dead-easy route and spike a batch of store-bought nog, but if you're up for making a small dose of extra effort, it'll pay off in spades. Sweet, but not cloying, and undeniably boozy, this particular big-batch recipe has your holiday party or a trip back home for the holidays written all over it.
In a large bowl, whisk egg yolks, brown sugar, and salt until thickened and pale brown in color, 2 to 3 minutes. Whisk in cream and milk, followed by the brandy, rum, and vanilla.
In a separate large, clean bowl, whip egg whites with an electric mixer on medium speed until soft peaks form, about 2 minutes. Gradually add granulated sugar, and continue whipping until firm, glossy peaks form, 1 to 2 minutes longer.
Transfer cream mixture to serving bowl. Fold in egg whites with a rubber spatula, and ladle portions into cups. Sprinkle with freshly grated nutmeg, and serve.