In a large bowl, combine strawberry jello mix and boiling water. Whisk to dissolve all of the jello. Add ice and stir until ice is melted.
Whisk in vanilla instant pudding mix until thoroughly combined and jello mixture thickens.
Cover the bowl with plastic wrap and refrigerate for 15 minutes.
Fold whipped topping into jello/pudding mixture until combined.
Gently stir in strawberries, pineapple, and marshmallows.
Refrigerate for at least one hour before serving.
Notes
This jello strawberry fluff is such a pretty color; using a see-through bowl, such as a trifle bowl, would be a great way to show off the lovely pink color.
Stir all the ingredients together carefully, as you don’t want to break apart the fruit pieces.
For best results, make sure you give your strawberry marshmallow fluff at least 1 hour of chilling time. It allows all of the yummy flavors to blend together.