In a medium saucepan over medium-low heat, gently warm the milk, stirring occasionally until tiny bubbles form at the edges.

Once the milk is heated, add the chopped white chocolate and stir until fully melted and blended into the milk.

Remove from heat and sift in the matcha and honey. Add a pinch of salt and whisk vigorously to avoid clumps.

Whisk the mixture again to aerate it, using a handheld frother if available.

Pour into mugs and garnish with toasted marshmallows before serving warm.