In a microwave-safe bowl, melt the white chocolate, stirring every 30 seconds until it's smooth. Take care not to overheat the chocolate.
To add a green drizzle to your truffles, set aside some of the melted white chocolate and mix in green food coloring. Add a few drops at a time until you achieve the desired shade of green.
Take the green filling balls out of the freezer.
Using a fork, toothpick, or dipping tool, dip each frozen ball into the melted white chocolate, allowing any excess to drip off. Set the coated truffles back on the rack or parchment paper and repeat with the remaining truffles.
For an optional touch, sprinkle a pinch of matcha powder over the truffles. It’s best to do this while the coating is still slightly warm, as it will help the matcha powder adhere more easily.
If you are using green melted chocolate for decoration, dip a teaspoon into the mixture and drizzle it over the truffles in a zig-zag pattern.
Allow the white chocolate coating to fully set, either at room temperature or in the refrigerator for quicker results.