Step 1: In a large pitcher, whisk together coconut milk, heavy cream, sweetened condensed milk, vanilla syrup, nutmeg, and cinnamon until smooth.
Step 2: Gently stir in the chilled sparkling white wine to combine without losing too much carbonation.
Step 3: Add ice cubes to the pitcher and stir briefly to chill the mixture.
Step 4: Pour into serving glasses and garnish each with a few fresh cranberries and a small rosemary sprig.