Step 1: In a medium saucepan, combine the whole milk and heavy cream. Heat over medium-low heat until warm and steaming, but not boiling.
Step 2: Add the white chocolate chips and sugar to the saucepan. Stir continuously until the white chocolate chips are fully melted and the sugar is dissolved, creating a smooth mixture.
Step 3: Remove the saucepan from the heat. Stir in the vanilla extract and 1 tablespoon of strawberry syrup (or puree). Taste and add the second tablespoon of strawberry syrup if you desire a stronger strawberry flavor or more vibrant pink color.
Step 4: If using, add a few drops of pink food coloring at this stage, stirring until your desired pastel pink hue is achieved.
Step 5: Pour the hot chocolate into mugs. Top generously with whipped cream, then garnish with snowflake-shaped marshmallows (or mini marshmallows) and a dusting of edible shimmer dust for a magical snowy effect. Serve immediately and enjoy!