Step 1 Heat the oven to 425 degrees.
Step 2 In a large bowl, whisk together the flour, cornmeal, baking powder and salt. Separately, in a medium bowl, whisk together the milk, egg and butter.
Step 3Whisk the milk mixture into the flour mixture and pour into a greased 8-inch square pan. Bake until pale golden and a toothpick inserted in the center comes out clean, about 20 to 25 minutes.
Step 4Cool 5 minutes, invert on a rack and cool completely.
Step 5Turn the oven down to 350 degrees. When the bread is cool, cut it into rough 1-inch cubes and place them in a baking pan. Bake, stirring occasionally, until the bread is dry and deep golden, about 20 minutes. (Recipe can be prepared to this point 1 day in advance and stored at room temperature.)