⭐ Cornstarch (Best Nut-Free Option)
1:1 (1 tablespoon cornstarch per 1 tablespoon arrowroot powder)Cornstarch is a fine powder derived from corn that acts as an effective thickener and tenderizer in baked goods. It gelatinizes when heated, helping to bind the dough and prevent excessive gluten development, which is crucial for a flaky pie crust.
When substituting, use the same amount as arrowroot powder. Be cautious not to overwork the dough as cornstarch can become gummy if mixed excessively. It is best added along with the flour before cutting in the fat.
Compared to arrowroot, cornstarch may produce a slightly less glossy finish but will still yield a tender, flaky crust with minimal impact on flavor or texture.