Line a 9×9-inch air fryer-safe baking pan with parchment paper, leaving overhang for lifting.
Mix flour, sugar, and salt. Cut in the cold butter until crumbly, then press evenly into the prepared pan.
2 cups all-purpose flour, ½ cup sugar, ½ teaspoon salt, 1 cup cold butter
Air fry at 350°F (180°C) for about 10 minutes, or until lightly golden.
In a bowl, whisk eggs, corn syrup, brown sugar, melted butter, and vanilla until smooth. Stir in the pecans.
4 large eggs, 1 ½ cups light corn syrup, 1 ½ cups packed brown sugar, 3 tablespoons butter, 2 teaspoons vanilla extract, 2 ½ cups chopped pecans
Pour the filling over the hot crust. Air fry for 15–20 minutes, or until the center is just set but still slightly jiggly.
Cool completely in the pan for at least 2 hours. Slice into bars and enjoy!