In a large mixing bowl, combine the thawed frozen whipped topping and the cottage cheese. Use a spatula to gently fold them together until well blended.
Sprinkle the orange gelatin mix over the whipped topping and cottage cheese mixture. Gently fold it in until the powder is fully incorporated.
Carefully fold in the drained mandarin oranges, ensuring they are evenly distributed throughout the mixture.
Add the mini marshmallows to the bowl and fold them in as well.
Cover the bowl with plastic wrap or transfer the salad to a serving dish and chill in the refrigerator for at least 2 hours before serving.
