Pick by how they take it
Their usual order tells you what to give.
Why matcha and white chocolate work
Good matcha is grassy, a little bitter and a little savory. White chocolate is mostly cocoa butter, milk and sugar, so it rounds off the bitterness without covering the tea, the same way milk does in a latte. Dark chocolate's own bitterness fights the tea, which is why matcha chocolate is almost always white.
Keep it green
Matcha fades in light, heat and air. Keep matcha chocolate somewhere cool, dry and dark, out of the fridge, and give it fresh.