Preheat oven to 350F/180C.
In a bowl, sift together flour, salt, and baking powder.
In a different bowl, beat the butter with sugar until well combined.
Add an egg at a time and beat until combined.
Add the lemon juice to the milk and keep aside.
Add half of the flour to the egg butter mixture, and stir gently.
Pour half the milk mixture to the batter, and stir gently.
Repeat the previous two steps. Pour the batter in your baking pan and spread evenly.
Bake for 30 minutes. In some ovens, it may take up to 45 minutes. The cake is done when the surface is golden brown and a toothpick inserted in the middle comes out clean.
Leave the cake in the pan for 5 minutes, and then flip on your serving plate.