To make the lemonade, add water, lemon juice, and granulated sugar to the blender. Secure the top and blend for 5 seconds.
Add the vanilla ice cream to the lemonade. Blend on low for 15 seconds. Increase the speed to medium and process for an additional 20 seconds or until the desired consistency is achieved.
Serve with straws and sliced lemon for a garnish.
Yield: 2 to 3 servings, depending on the size of the glass.
Tips/Notes
Adjust the amount of lemon juice for the desired level of tartness.