01 - Preheat oven to 350°F. Grease a 12-cup mini muffin pan thoroughly.
02 - Combine flour and salt in a bowl. Cut in cold butter until mixture resembles coarse crumbs. Gradually add cold water, mixing just until dough 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 mini 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 to wire rack. Cool completely before serving, optionally topped with whipped cream.