The difference between regular lemonade and pink lemonade is the addition of an extra ingredient that gives the regular lemonade a pink color. The extra ingredient could be cranberry juice, raspberry juice, crushed strawberries, strawberry juice, grenadine or red food coloring.
Pink lemonade first appeared in the United States in the 1800s, and it was often sold at carnivals, circuses and New York City street stands. Some claim it was invented by Pete Conklin, a man who was selling regular lemonade at a circus when he ran out of water and turned to leftover water that had just been used to wash pink stockings to make a batch of lemonade. The resulting pink lemonade sold more quickly than regular lemonade. Others claim it was invented when Henry Allott, a saloon keeper, inadvertently dropped a box of cinnamon candy into a batch of regular lemonade; again, the resulting pink lemonade also sold more quickly than the regular kind. Either way, a new recipe was born. Pink lemonade can be made by bringing granulated sugar and water to a boil over high heat to make a syrup, which is then chilled. Lemon juice, sugar and cranberry juice are then added to the syrup to create the drink.