Prepare the Blueberries:
Wash the blueberries gently and pat them dry with a paper towel. Set aside.
Make the Marshmallow Cream Base:
In a large mixing bowl, combine the sweetened condensed milk and vanilla extract.
Add the mini marshmallows and stir gently to coat them in the condensed milk. Let the marshmallows sit for a few minutes to soften slightly.
Whip the Cream:
In a separate bowl, whip the cream until soft peaks form. If using whipped topping, just fold it into the marshmallow mixture.
Combine and Fold:
Carefully fold the whipped cream into the marshmallow mixture, making sure it stays light and fluffy.
Gently fold in the fresh blueberries, taking care not to crush them.
Assemble the Dessert:
Transfer the mixture to a serving dish or individual cups. Use a spatula to smooth the top.
Garnish with crushed graham crackers or shortbread cookies for a little crunch and extra flavor.
Chill and Serve:
Refrigerate the Blueberry Marshmallow Delight for at least 1–2 hours to let the flavors meld and the dessert firm up.
Serve chilled and enjoy this heavenly, fluffy treat!