β Cornstarch (Best Nut-Free Option)
1 tablespoon cornstarch per 1 tablespoon cake flourCornstarch is a pure starch that gelatinizes when heated with liquid, providing a smooth thickening effect ideal for Panna Cotta. Since Panna Cotta relies on gelatin for setting rather than flour-based structure, cornstarch supports the creamy texture without adding gluten or protein that can cause toughness.
To use cornstarch effectively, dissolve it in a small amount of cold liquid before adding to the warm cream mixture to avoid clumping. Heat gently until the mixture thickens slightly before adding gelatin.
Compared to cake flour, cornstarch produces a cleaner, silkier texture and does not impart any floury taste, preserving the delicate flavor and mouthfeel of Panna Cotta.