In a large mixing bowl, add the crushed pineapple and vanilla instant pudding and stir until the pineapple juice and pudding starts to thicken.
Add the pineapple chunks, marshmallows, pecans, and coconut flakes, and mix with a spatula.
Fold in the thawed whipped topping until everything is evenly combined.
Cover with plastic wrap and chill in the refrigerator for 1 hour.
Notes
Storage:
To Store: Cover with plastic wrap and store in the refrigerator for up to 4 days. You can also store it in a large Tupperware container. If the juice starts to separate, give the fluff a quick stir.
To Freeze: Store in an airtight container, and freeze for up to 1 month. Thaw overnight in the refrigerator. Please note that the texture of the marshmallows may change during the thawing process. I think this dessert is best when made fresh.
Tips:
If you have trouble finding crushed pineapple, you can buy an extra can of pineapple chunks and chop up the chunks into small pieces. Just remember to reserve the juice.
You can use fresh pineapple chunks instead of canned pineapple if you prefer.
You can add or omit or add more marshmallows, coconut, or pecans according to your taste.
Feel free to use homemade whipped cream instead of whipped topping. I don’t recommend canned whipped cream because the consistency is too runny.