Preheat the oven to 180°C.

Cream the butter and sugar in a large mixing bowl.

Add the eggs while beating.

Sift the flour and salt into the butter mixture and mix.

Stir in the milk, vanilla essence and sweetcorn and stir until mixed well.

Spoon the battery into a greased oven-proof dish of approximately 22 cm x 22 cm.

Bake for 45 minutes or until set.