01 - Preheat oven to 350°F (175°C). Grease and line an 8-inch (20 cm) round cake pan with parchment paper.
02 - In a medium bowl, sift together flour, matcha powder, baking powder, and salt. Set aside.
03 - In a large bowl, whisk eggs and sugar until pale and fluffy, about 2–3 minutes.
04 - Add the melted butter and vanilla extract to the egg mixture and mix well.
05 - Alternately add the dry ingredients and milk to the wet mixture, starting and ending with dry ingredients. Mix just until combined; do not overmix.
06 - Pour batter into the prepared pan and smooth the top.
07 - Bake for 30–35 minutes, or until a toothpick inserted into the center comes out clean.
08 - Let cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.
09 - Dust with powdered sugar and serve with whipped cream or fresh berries if desired.