Pour the heavy whipping cream in the bowl of a stand mixer with the whisk attachment fitted. Whip on medium speed for about 3 minutes until stiff peaks form. Add in the vanilla extract and sugar, and mix well.
Chop and slice the apples and bananas, and place in a medium serving bowl. Drain the can of fruit cocktail, and pour in the fruit. Add in the whipped cream and marshmallows, and mix well with a spoon.
Serve immediately, or cover and let chill in the refrigerator. Keeps for up to 3 days. Enjoy!