Grandma’s Southern-Style Cornbread Dressing

Name: Grandma’s Southern-Style Cornbread Dressing
Cuisine: American, Southern
Ingredients: 1 cup yellow cornmeal; 1 cup all-purpose flour; 3 tablespoons granulated sugar; 1 tablespoon baking powder; 1 1/2 teaspoons kosher salt; 2 large eggs, lightly beaten; 1 stick (1/2 cup) unsalted butter, melted; 1 cup whole buttermilk; 1 (14 ounce) bag herb-seasoned stuffing, such as Pepperidge Farm; 2 sticks (1 cup) unsalted butter, divided; 2 cups finely chopped sweet onion; 1 1/2 cups finely chopped celery; 5 cups chicken or turkey stock; 5 large eggs, lightly beaten; 2 teaspoons dried sage; Kosher salt and freshly cracked black pepper