Can I make this casserole ahead of time?
Yes. Assemble the casserole in the baking dish, cover tightly, and refrigerate up to 24 hours. Add 5–10 minutes to the bake time if baking from cold.
What temperature should I bake this at?
Bake at 350°F for approximately 30–35 minutes, until the cornbread topping is golden brown and a toothpick inserted into the cornbread comes out clean.
Can I use a different cheese instead of Colby?
Yes. Cheddar, Monterey Jack, or a blend work well. Use the same amount and shred it fresh for even melting.
Can I double this recipe?
Yes. Double all ingredients and use a 9×13-inch baking dish. Bake time may increase by 5–10 minutes; check that the cornbread top is golden and set.
What if I don't have sour cream for the cornbread topping?
Substitute Greek yogurt or Mexican crema in a 1:1 ratio. Both keep the cornbread moist and tender.