"When life gives you lemons, make lemonade." So our mothers told us. Wrongly, it turns out. Today, the phrase would better be rendered: "When life gives you citric acid, make acid-ade." Citric acid, ...

There's nothing quite as simple as a basic lemonade. Sugar, water, lemon juice—done! But this easy recipe has so many variations that even a traditional cup of lemonade can vary from cook to cook.