How to Make It
Pulse first flour, sugar, and salt in food processor 3 or 4 times or until combined. Add shortening and butter. Pulse 8 to 10 more times or until mixture resembles coarse meal. Pour ice water over mixture. Pulse 4 or 5 times or until dough clumps together, adding small amounts of ice water at a time, if necessary. Gently shape dough into a flat disk. Wrap in plastic wrap, and chill 30 minutes.
Bake at 400° for 10 minutes. Remove weights and parchment paper, and bake 8 to 10 more minutes or until lightly browned. Transfer to a wire rack, and cool completely.