Find oolong tea powder in specialty tea shops or online. To make the cake, prepare a 9"x13" tray with parchment and separate the egg yolks from the whites. Whisk the yolks with sugar, oolong tea ...

fresh ones are necessary to top off the tea cakes. Preheat the oven to 350 F. Grease a 12-cup muffin tray with cooking spray ...

The cake needs several hours in the fridge to set ... For the matcha (green tea powder), there’s no need to use the super-expensive ceremonial-grade quality, but do buy one that you are willing ...