1 cup milk
1 cup rum cream liqueur (such as RumChata®)
1 (4 ounce) package instant chocolate pudding mix
1 (8 ounce) container frozen whipped topping (such as Cool Whip®), thawed
Mix milk, rum liqueur, and pudding mix together in a bowl until thickened. Gently stir whipped topping into pudding mixture. Spoon into disposable shot cups and place on plate. Freeze until chilled and set, at least 3 hours.