Flour, sugar, eggs, vanilla extract, baking powder, milk, butter.
Whisk eggs and sugar until fluffy. Add vanilla extract, melted butter, milk, and blend until smooth.
Sift flour and baking powder together, then gently fold into the wet mixture to create a smooth batter.
Preheat the oven to 350°F (175°C). Grease a round baking pan with butter and lightly dust it with flour.
Pour the batter into the pan and bake for 30-35 minutes, until a toothpick inserted in the center comes out clean.
Remove the cake from the oven and let it cool for 10 minutes.
Slice and serve your fluffy sponge cake with tea or coffee. Perfect for hosting your next kitty party!