Pecan pie is a nutty, sweet treat that is perfect for dessert or as an afternoon snack. Pecan pecan pies are custard-based pecan pie recipes with pecans mixed in sugar, eggs, and butter that are baked until set. Other ingredients may include vanilla extract, flour, butter, salt, brown sugar, corn syrup or molasses.Pecan pies are often topped pecan pie icing , which consists of pecans mixed with powdered sugar and milk to make a creamy glaze for pecan pie desserts.