Saucy sloppy joe beef bakes beneath a golden cornbread topping in a 9x13-inch dish.
If the top browns before the cornbread center is cooked through, tent loosely with foil. For advance prep, refrigerate the covered beef filling for up to 24 hours, warm it on the stovetop until hot, and mix the batter just before baking. Refrigerate leftovers within 2 hours in shallow, covered containers; use within 3 to 4 days. Thaw frozen leftovers in the refrigerator and reheat to 165°F.
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