Put all of the ingredients in a large 90-ounce capacity blender jar. Make in batches when using a smaller blender.
Add the cover and blend until smooth.
Pour into glasses, garnish with lemon slices, and serve immediately.
Video
Notes
One: Make Ahead
You can make it up to two hours ahead of time. After blending the drink, place the cover on the blender jar or transfer the drink to a pitcher with a lid and put it in the freezer. Shake the lemonade whip every 20-30 minutes to keep it from freezing solid. Stir the drink or shake it well before serving.
Two: Flavor Variations
Strawberry Lemonade Whip: Add strawberries, strawberry sauce, and powdered strawberry drink mix such as Crystal Light to the blender to give the drink a strawberry flavor and pink color.
Whipped Raspberry Lemonade: To make a raspberry flavor, you can add raspberry syrup, raspberry sauce, raspberries, or powdered raspberry drink mix, depending on what you have available.
Frosted Blueberry Lemonade: Blend blueberries, blueberry sauce, or blueberry syrup into the lemonade whip.