1 quart eggnog
1 (5.1 ounce) package instant vanilla pudding mix
1 (12 ounce) container frozen whipped topping
1/2 cup rum, or amount desired
Pour the eggnog into a mixing bowl. Whisk in the pudding mix, whipped topping, and rum until evenly blended. Cover and refrigerate until well chilled, or about 2 hours. Serve cold.