Begin by preparing the fresh lemonade. In a pitcher, pour 1 cup of freshly squeezed lemon juice. Add 1/2 cup of granulated sugar and stir until the sugar is completely dissolved.
Mix in 2 cups of cold water to the lemonade mixture and stir well. Refrigerate to chill, ensuring the lemonade is ice cold before proceeding.
In a blender, add 3 cups of creamy vanilla ice cream and 2 cups of the chilled homemade lemonade. If you prefer a thinner consistency, you can adjust the amount of lemonade accordingly.
Secure the lid on the blender and blend the ingredients on high speed for about 30 seconds, or until the mixture achieves a smooth and creamy texture.
To serve, pour the frosted lemonade into glasses immediately. If desired, garnish with a slice of lemon and a dollop of whipped cream for an extra touch of indulgence.
Clean the blender and equipment promptly to prevent any sticky residues. Enjoy the frosted lemonade promptly for the best flavor and consistency.