This is the one that i usually follow, it's a spanish recipe... sometimes i use one lemon and one lime, but the most important thing is that you blend them whole!
Ingredients:
2 limes or lemons, quartered and any seeds removed
8 cups of cold water
Approximately ˝ cup of sugar, more or less based on your preference
Ice cubes as desired
Preparation:
Place the quartered limes or lemons in the blender with 4 cups of water and sugar.
Blend until the limes or lemon is completely pulverized, the mixture should be slightly foamy with a whitish color.
Strain the lemonade and add the remaining 4 cups of water.
Serve with or without ice based on individual preference.