If you want to make this uber easy, just buy lemonade or lemonade mix and then you just need ice cube trays and a blender.
Also, I just want to say, I particularly like this method for making frozen lemonade because you are not diluting it. It is just delicious lemonade with more delicious lemonade!Ingredients
Lemons or lemon juice (I ended up juicing 8 lemons to make 1 cup of lemon juice)
Water (you'll need some for the simple syrup, if you make that, and for the lemonade)
Sugar or simple syrup
This recipe makes about 3 - 4 servings based on how much you want.