Preheat your oven to 375°F (190°C) and grease a 9x9-inch baking pan.
In a large bowl, mix the dry ingredients: corn flour, all-purpose flour, sugar, baking powder, baking soda, and salt until everything is evenly combined.
In another bowl, combine your wet ingredients: sour cream, eggs, and melted butter. Stir gently until the mixture is smooth and well blended.
Combine both mixtures: Pour the wet ingredients into the bowl with the dry ingredients. Carefully mix them together until just combined—be careful not to overmix, as we want that delightful, fluffy texture!
Pour the batter into the greased pan and bake for about 25-30 minutes, or until a toothpick inserted into the center comes out clean.
Allow the cornbread to cool for a few minutes in the pan, then transfer it to a wire rack. Cut it into squares, and enjoy the heavenly, tender slices of cornbread!