This Easy Make-Ahead Corn Casserole Recipe is the perfect side dish for any holiday meal. This corn casserole is creamy, savory, sweet, and has a heavenly soufflé texture. It can be made ahead of time, so there's no last minute stress.
Preheat oven to 325F with rack on lower middle position. Lightly grease a 9x13 baking dish and set aside.
In a large bowl, whisk together the flour, cornmeal, sugar, baking soda, salt, and olive oil until fully combined and not lumpy. Add all remaining ingredients, except Panko breadcrumbs and parsley, to the bowl and gently stir together until fully incorporated.
Pour mixture evenly into prepared baking dish. Top with evenly Panko breadcrumbs and parsley. Bake 50-55 min or until mostly set. Center will not be completely firm, but will set upon cooling. Let casserole sit at room temp for 30-60 minutes to give it time to firm up; serve either at room temp or reheat in oven until fully warmed through. You can give it an extra broil for 5 minutes for topping to re-crisp.