Preheat the oven to 400F
Spray the 8x8 baking dish liberally with cooking spray
Put the milk and eggs into the large mixing bowl
Whisk the ingredients together until the eggs are combined into the milk
Add the cornmeal, flour, sugar, salt, and baking powder to the mixing bowl
Stir until all ingredients are completely combined
Add the butter to a small, microwave-safe mixing bowl
Loosely cover the small bowl
Microwave the butter on 30% power for 15 seconds
Stir
Repeat the microwave then stir steps until the butter is completely melted
Add the butter to the mixture in the large mixing bowl
Stir until the butter is mixed in completely
Pour the mixture into the baking dish
Bake for 25 minutes until the top is golden brown
Remove the baking dish from the oven
Allow to cool for 15 minutes
Serve