By)cafetiful
Preheat the oven to 170°C.
Cream room temperature butter and sugar until smooth.
Add eggs one at a time, mixing well after each addition.
Sift cake flour, green tea powder, and baking powder together, then fold into the mixture.
Adjust thickness with milk.
Pour the batter into the mold and smooth the top.
Bake at 170°C for 35 minutes.