Recipe Courtesy of Williams-Sonoma Kitchen.
A slushy blend of sweetened fresh lemon juice and ice, frozen lemonade has been a popular summer tradition in Rhode Island and Massachusetts since the early 1900s. Over the years, the thirst-quenching beverage has inspired delicious variations. This version includes blackberries, but you could use strawberries, raspberries or blueberries for equally tasty results.
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