Line a baking sheet with parchment paper, smoothing it flat.

Melt the white chocolate chips in the microwave, stirring every 30 seconds until smooth.

Melt the green candy melts in a separate bowl until glossy and pourable.

Pour the white chocolate onto the baking sheet and spread into an even layer.

Drizzle green candy melts over the top and gently swirl with a spoon.

Add rainbow sprinkles and mini marshmallows, then press gold chocolate coins lightly into the surface.

Refrigerate for 30 to 40 minutes until fully set.

Break into pieces and arrange on a serving plate.