This recipe comes from my sister Katherine (April 2021):

Blue Cornbread Dreams

We used organic blue corn masa flour, which must be sifted.

1 cup sifted cornmeal
1 cup flour
1 tablespoon baking powder
1/2 teaspoon salt
2 to 4 tablespoons sugar (optional)
1 egg
1 cup milk
1/4 cup melted fat or oil
Mix dry ingredients together in a medium sized bowl.
In a small sized bowl, beat egg. Add milk.  Add oil or fat.  Add to dry  ingredients.
Fill mixture into the larger bowl, stir just enough to mix.  Fill greased 9×9 pan half full (we used oil).
Bake at 425F degrees 20 to 25 minutes, until lightly browned.  Yields 6 servings.
For corn muffins, use recipe for cornbread.  Fill greased muffins pans half full of cornmeal mixture.  Baking time will be 15-20 minutes.  Yield 12 servings.
We made a meal with pinto beans and the cornbread.  Very good!