Preheat over at 320°F / 160°C.
Sift the flour and baking powder. Set aside.
In the mixing bowl, add in the butter and sugar. Mix it on low speed for 2 minutes until the sugar disappear. Then increase to medium speed and mix for 15 minutes. One of the keys to this butter cake, these 2 ingredients must be mixed well. Continue mixing until the butter is white, light and fluffy. You will see that in about 15 minutes.
Add in the eggs, one by one. Mix until the yellow eggs disappear.
Add in the sifted dry ingredients spoon by spoon. This is another key to make good butter cake.
Add the milk and vanilla extract. Continue mixing for another 3-5 minutes.
Pour the batter into the baking pan. Bake at 160°C / 320°F for 55-60 minutes.
Test the cake using the cake test.
Cool the cake on the cooling rack for about 15 minutes. Once it is cooled, you may cut and serve the cake.
