Step 1

Preheat the oven to 325 degrees F. Spray a 9-inch square baking dish with nonstick spray.

Step 2

Stir together the whole-kernel corn, cream-style corn, corn muffin mix, sour cream and butter in a large bowl. Stir in the ham and scallions until just combined. Pour into the prepared baking dish and bake until golden brown, about 1 hour 15 minutes.

Step 3

Sprinkle evenly with the Cheddar and continue to bake until the cheese is melted, about 5 minutes. Sprinkle with scallions before serving.