In a large bowl, combine the pudding mix with the whipped topping and cottage cheese.
Fold in the drained crushed pineapple and mini marshmallows.
Chill for 1-2 hours for a fluffier texture, or serve immediately. Store in an airtight container in the refrigerator up to 7 days.
Notes
Makes about 6 cups, or twelve (1/2 cup) servings.
To make without cottage cheese: Do NOT drain pineapple. Mix the pudding with the crushed pineapple in its juices first. Then fold in the whipped topping and mini marshmallows.
Optional Mix-ins: Chopped Nuts (pistachios or pecans), Sweetened Coconut Flakes, Mandarin Oranges, Fruit Cocktail, or halved Maraschino Cherries.