Mix flour, sugar, corn starch, orange peel, ginger, pumpkin pie spice, baking soda and salt in a large mixing bowl. Whisk molasses, water and egg in a small bowl; set aside.
Cut butter into flour mixture using a pastry blender or 2 knives until the mixture resembles coarse meal. Pour molasses mixture over flour; beat with mixer until dough forms a ball. Knead for 2 to 3 minutes until smooth. Divide in half, wrap in plastic wrap. Chill a minimum of 2 hours.
Preheat oven to 350°F. Roll dough on lightly floured surface to 1/4-inch thickness. Cut with cookie cutters. Place on baking sheets.
Bake for 11 to 13 minutes. Cool on wire racks.
Decorate as desired with icings, sugars and sprinkles.