This matcha sponge cake is a light and airy dessert that is perfect for any occasion. The cake is made with eggs, sugar, flour, and matcha powder, which gives it a beautiful green color and a subtle green tea flavor. To make the cake, simply beat together eggs and sugar until light and fluffy. Mix in flour and matcha powder, and then pour the batter into a greased cake pan. Bake for 20-25 minutes, and then let the cake cool before slicing and serving.