How do you thicken a blackberry pie? Juicy fresh fruit pies need some sort of starch to thicken the filling, whether it’s cornstarch, tapioca, or all-purpose flour. This recipe uses cornstarch.

(WAFB) - A slice of pie is an American tradition. With this recipe ... cornstarch mixture into berries. Return to a boil and cook 2 minutes. Remove from heat and let cool. Pour cooled berry ...