Preheat oven to 325°F. Grease a shallow, 1 1/2-quart casserole with butter.
In a medium bowl, whisk together eggs, cream and milk. Add corn, chives, nutmeg, salt and white pepper; stir mixture to combine. Pour into casserole.
Place casserole in large roasting pan; pour hot water to reach halfway up sides of casserole. Bake 45 minutes to 1 hour. Remove casserole from water bath and let cool for 10 minutes.