Usually, when I make sorbet, it turns to ice in the freezer. The cornstarch in this one is like magic -- keeps it silky and soft. Also, if you have very sweet berries (or just dont like a lot of sugar, like me), use the lesser amount of sugar. On the other hand, my kids love the much sweeter version. Just taste the sorbet base after the sugar has melted into it & adjust it to taste.
Usually, when I make sorbet, it turns to ice in the freezer. The cornstarch in this one is like magic -- keeps it silky and soft. Also, if you have very sweet berries (or just dont like a lot of sugar, like me), use the lesser amount of sugar. On the other hand, my kids love the much sweeter version. Just taste the sorbet base after the sugar has melted into it & adjust it to taste.
Standard fruit purees freeze into solid blocks because high water content forms large ice crystals. Adding a starch slurry binds free water molecules during heating. This molecular interference halts hard crystal growth. Whisk the cornstarch into cold water completely before adding it to hot berries. Lumps will form instantly if the starches hit hot liquid directly.
Heating the fruit mixture dissolves the sugar fully while activating the starch thickener. Keep the burner at medium-low heat. Scorching destroys delicate berry esters rapidly. Simmer the base for exactly one minute after adding the slurry. Undercooked starch tastes chalky and fails to bind moisture. Chill the cooked base in the refrigerator until it drops below 40 degrees Fahrenheit before churning.
Introduce the chilled base to an active ice cream machine immediately. Slow freezing ruins texture by creating large jagged shards regardless of starch content. Store finished sorbet in a shallow airtight container pressed with parchment paper. Consume within two weeks for optimal silkiness. Prolonged freezer storage causes sugar migration and textural degradation.