Begin by gathering all the necessary ingredients. Make sure your heavy cream is chilled and ready to use. Zest a lemon, if desired, and set aside. Squeeze the fresh lemon juice, taking care to remove any seeds.
In a high-powered blender, combine the heavy cream, lemon juice, and your preferred low-carb sweetener. Blend on high speed until the mixture is smooth and creamy.
Once the Creamy Lemonade Drink is blended to your desired consistency, add the lemon zest (if using) and a few ice cubes. Gently stir to incorporate the zest and chill the drink.
Pour the Creamy Lemonade Drink into your favorite glasses and serve immediately. Garnish with a lemon wedge or a sprinkle of additional lemon zest, if desired. Savor the refreshing, low-carb treat and enjoy!