In a bowl, sift together, flour, salt and zest.

Make a well at the center, add in vanilla extract, melted butter, milk and the eggs. With your mixture on medium speed for 10 minutes, mix until all ingredients are well incorporated. The cake butter should be semi thick.

Transefer into a prepared baking dish of your choice. And bake for 35-40 minutes in an 180°C preheated oven. Or until skewer inserted at the center comes out clean.

Remove from the oven and allow to rest for 10 minutes, then remove from the tin and allow to cool completely.