Preheat the oven to 425 degrees F (220 degrees C).
In a large bowl, mix the butter, sugar and vanilla together. Mix in the eggs, then stir in the cornmeal, evaporated milk and vinegar until smooth.
Bake for 10 minutes in the preheated oven, then reduce heat to 300 degrees F (150 degrees C) for 40 minutes. Let cool. Cut and top servings with whipped cream. You will think you have died and gone to heaven.