Preheat the oven at 350°F.
To make a matcha cake batter, break up the eggs and put them into a bowl.
Incorporate matcha powder, cocoa powder, vanilla sugar, oil, and yogurt. Whisk until smooth.
In a separate bowl, mix the flour with baking soda and salt.
Combine dry and wet ingredients and mix until smooth.
Mix this batter slowly in boiling water into an even mixture.
Prepare a baking tray with grease.
Incorporate the cake batter into it. Place it in the oven for baking.
The cake wll take 30-35 minutes to bake. Meanwhile get the frosting ready.
Use a stand mixer fitted with paddle attachment. Beat the butter using matcha powder.
Add vanilla and sugar gradually. Create a smooth and fluffy mixture.
Once the cake is cool and it is cool, you can frost it with buttery frosting.