Preheat oven to 200°C and grease a 9x9" baking dish.
In a large bowl, cream butter and sugar until light and fluffy.
Add to the creamed mixture the rest of the ingredients: eggs, milk, flour, cornmeal, baking powder and salt and mix with a whisk until combined.
Pour into a greased 9x9" baking pan and bake 20-25 minutes or until a toothpick inserted in center comes out clean.
9 servings