01 - Preheat oven to 350°F. Grease and line an 8-inch round cake pan with parchment paper.
02 - In a medium bowl, sift together the all-purpose flour, matcha green tea powder, baking powder, and salt. Set aside.
03 - In a large bowl, whisk the eggs and granulated sugar together until the mixture turns pale and fluffy, about 2 to 3 minutes.
04 - Add the melted butter and vanilla extract to the egg mixture, mixing thoroughly until well incorporated.
05 - Alternately add the sifted dry ingredients and the milk to the wet mixture, starting and ending with the dry ingredients. Fold gently just until combined; avoid overmixing to keep the batter light.
06 - Pour the batter into the prepared cake pan and use a spatula to smooth the top evenly.
07 - Bake for 30 to 35 minutes, or until a toothpick inserted into the center of the cake comes out clean.
08 - Allow the cake to cool in the pan for 10 minutes, then carefully transfer it to a wire rack to cool completely.
09 - Dust the top with powdered sugar and serve with whipped cream or fresh berries if desired.