For a peppermint variation, substitute 1 ounce of the vanilla vodka with peppermint vodka. If you can’t find Godiva white chocolate liqueur, Mozart White Chocolate or white crème de cacao are great alternatives. Shake vigorously to aerate the cream — this creates the signature frothy top of a White Christmas Martini. To make ahead, mix a large batch without ice and refrigerate for up to 24 hours, then shake each serving over ice before pouring. Garnish with a sparkling sugar rim, white chocolate shavings, or a holiday cranberry skewer.