Step 1: Prepare the Tart Dough : In a medium bowl, combine flour, sugar, and salt. Cut in butter until mixture resembles coarse crumbs. Gradually add ice water until dough forms. Wrap in plastic and refrigerate for 30 minutes.

Step 2: Preheat Oven and Prepare Tart Shells : Preheat oven to 350°F (175°C). Roll out dough on a lightly floured surface and cut into circles slightly larger than your mini tart pans or muffin tin. Press dough into mini tart pans or muffin cups, trimming edges.

Step 3: Make the Filling : In a small bowl, whisk together brown sugar, melted butter, corn syrup, egg, and vanilla until smooth. Stir in chopped pecans.

Step 4: Assemble and Bake : Spoon filling into prepared tart shells, filling each about ¾ full. Bake for 18–20 minutes or until filling is set and tops are lightly golden. Remove from oven and cool in pan for 10 minutes before transferring to a wire rack.