In a medium bowl, combine the corn, mayonnaise, sour cream, jack cheese, garlic powder, chili powder, paprika, salt, lime juice, one-half the cotija cheese and egg. Whisk until combined. Grease a 2 quart casserole dish with 2 tablespoons butter. Pour the mixture in the casserole dish and bake, uncovered, for 45 minutes.
To serve sprinkle reserved cotija cheese over the casserole.