01 - Preheat oven to 350°F. Grease a 12-cup mini muffin pan with cooking spray or butter.
02 - Mix flour and salt in a bowl. Cut in cold butter until mixture resembles coarse crumbs. Gradually add cold water, mixing until dough just comes together.
03 - Roll dough on lightly floured surface. Cut twelve 3-inch circles and gently press each into mini muffin tin wells.
04 - Whisk brown sugar, corn syrup, melted butter, egg, vanilla, and salt until smooth. Stir in chopped pecans.
05 - Spoon filling evenly into prepared crusts, about 1 tablespoon per pie.
06 - Bake for 22-25 minutes until filling is set and crust is golden brown.
07 - Cool in pan for 10 minutes, then carefully remove and transfer to wire rack to cool completely. Serve plain or with whipped cream.