Step 1

Preheat oven to 400°. Lightly coat a 13x9" baking dish with nonstick spray. Whisk flour, cornmeal, sugar, baking powder, salt, and pepper in a large bowl. Whisk eggs, buttermilk, and butter in a medium bowl. Make a well in the dry ingredients and pour in egg mixture; stir into dry ingredients with a wooden spoon until combined. Scrape batter into prepared pan and smooth top.

Step 2

Bake cornbread, rotating dish halfway through, until a tester inserted into the center comes out clean, 20–25 minutes. Let cornbread cool slightly in dish, then cut crosswise into 4 large pieces. Transfer to a wire rack with a large spatula and let cool completely.Do Ahead: Cornbread can be baked 2 days ahead. Store tightly wrapped at room temperature.