In a large mixing bowl, combine the cornmeal, milk, creamed corn, black beans, cheddar cheese, baking powder, sugar, and salt. Mix until well combined.
Stir in the melted butter until the mixture is smooth.
If you like a bit of spice, fold in the sliced jalapeños.
Pour the cornbread mixture into a greased 9x9-inch baking dish or oven-safe skillet.
Bake in the preheated oven for about 25-30 minutes, or until the top is golden and a toothpick inserted in the center comes out clean.
Let it cool for a few minutes before slicing into squares.
Notes
Serve warm, garnished with fresh cilantro or green onions, and a dollop of sour cream.