Try this Homemade Watermelon Sorbet recipe.
The ingredient quantities list water-heavy melon and acidic juice, but they omit the physics of ice crystal formation. Pure water freezes into large, needle-like crystals that yield an icy, unpleasant crunch rather than a creamy mouthfeel. Dissolved sugars and corn syrup lower the freezing point of the mixture, physically interrupting water molecules from bonding into rigid lattices. Adding exactly half a cup of light corn syrup alongside granulated sugar prevents solid block formation, ensuring the water only partially freezes into micro-crystals during the initial two-hour chilling window.
Achieving structural integrity relies entirely on breaking down the frozen sheet at the correct consistency. Pouring the blended liquid onto a parchment-lined baking sheet creates a thin surface area that chills uniformly. When the timer hits two hours, check for a firm yet pliable texture that yields easily to a spoon rather than ringing hard against metal. Processing these chunks a second time introduces air into the cold matrix while shearing oversized ice crystals down into microscopic particles, transforming a brittle sheet into a velvety emulsion.
Freezer ambient temperatures fluctuate wildly, meaning timing depends heavily on actual thermal output rather than clock time alone. Place the baking sheet on the coldest shelf of the freezer, typically near the back where temperatures hold steady at zero degrees Fahrenheit or lower. This recipe produces six servings, but leftovers degrade rapidly if stored improperly. Consume the batch immediately after the second spin for optimal texture, or store it in an airtight container for up to 48 hours before the crystal structure degrades into hard ice.