This document provides information on key ingredients in pies and pastries and how they contribute to texture. It discusses how flour, fat, liquid, and salt are used to make pastry dough flaky and tender. Specifically, it explains that flour provides structure, fat inhibits gluten development to create layers, and liquid hydrates flour. The right balance is important - too much of any ingredient can make the crust tough or crumbly. It then defines different types of pies, including fruit, cream, custard, and chiffon pies. Steps for making basic pastry dough and decorative crust edges are also outlined.