Preheat oven to 375°. Spray a 12-inch cast-iron skillet with cooking spray.
In large saucepan, whisk together milk, cornmeal, and salt until smooth; cook over medium-high heat, whisking constantly, until mixture is thickened, about 5 minutes. Stir in 4 cups cheese, corn, green onion, butter, and red pepper until melted. Slowly whisk eggs into cornmeal mixture until well combined. Pour mixture into prepared pan, and sprinkle with remaining 2 cups cheese.
Bake until center is set and cheese is lightly browned, 40 to 50 minutes. Serve immediately.
Recipe by Paula Deen Magazine at https://pauladeenmagazine.com/cheesy-corn-spoon-bread-recipe/