01 - Preheat oven to 350°F. Grease a 12-cup mini muffin pan thoroughly with butter or cooking spray.
02 - In a mixing bowl, combine flour and salt. Cut in cold cubed butter using a pastry cutter or fork until mixture resembles coarse crumbs. Gradually add cold water, 1 tablespoon at a time, mixing just until dough holds together when pressed.
03 - Roll dough on lightly floured surface to 1/8-inch thickness. Cut twelve 3-inch circles using a round cutter or glass. Gently press each circle into the wells of the mini muffin tin, ensuring dough reaches up the sides.
04 - In a separate bowl, whisk together brown sugar, corn syrup, melted butter, egg, vanilla, and salt until completely smooth and well combined. Fold in chopped pecans.
05 - Spoon approximately 1 tablespoon of pecan filling into each prepared crust, distributing evenly among all 12 cups.
06 - Bake for 22-25 minutes until filling is set and no longer jiggles in the center, and crusts are golden brown.
07 - Let pies cool in pan for 10 minutes. Carefully run a knife around edges to loosen, then remove to wire rack. Cool completely before serving. Optional: top with whipped cream.