Creating the Red White & Blue Fluff Salad is a breeze when you follow these step-by-step instructions:

1. Prepare the Fruit: Rinse the strawberries and blueberries. Slice the strawberries and set aside.
2. Mix the Base: In a large mixing bowl, combine whipped topping, yogurt, and granulated sugar.
3. Incorporate the Vanilla: Add vanilla extract to the whipped topping mixture and stir until smooth and well combined.
4. Add Fruit and Marshmallows: Gently fold in the sliced strawberries, blueberries, and mini marshmallows into the whipped topping mixture.
5. Check the Consistency: Ensure the fruits are evenly distributed throughout the fluffy mixture.
6. Chill: Cover the mixing bowl with plastic wrap and place in the refrigerator for at least 2 hours to allow the flavors to meld.
7. Serve: Once chilled, spoon the salad into a serving bowl. Garnish with additional berries or mint leaves if desired.

This process will yield a delectable and fluffy salad that everyone will love!