The original recipe for Chiffon Pie was developed in 1926 by bake Monroe Boston Strause, who was known as the u0022Pie King.u0022 A chiffon pie is any kind of pie where the filling is made by folding meringue into a flavored base that has been stabilized with unflavored gelatin, like lemon curd or spiced pumpkin filling. It makes for a light and airy pie filling that is truly delicious and unique!