Prepare the Base:

Preheat your oven to 350°F (175°C). Line a 9x13 inch baking pan with parchment paper, leaving some overhang for easy removal.

In a mixing bowl, combine the flour, softened butter, granulated sugar, and salt. Mix until the ingredients are well combined and form a crumbly dough.

Bake the Crust:

Press the dough evenly into the bottom of the prepared baking pan to form the crust.

Bake in the preheated oven for about 15-20 minutes, or until the edges are lightly golden. Remove from the oven and set aside.

Add the Caramel Layer:

In a microwave-safe bowl, combine the sweetened condensed milk and caramel sauce. Microwave on high in 30-second intervals, stirring between each, until the mixture is smooth and well combined.

Pour the caramel mixture over the baked crust, spreading it evenly with a spatula.

Add the Chocolate and Pecans:

Sprinkle the semisweet chocolate chips evenly over the caramel layer.

Sprinkle the chopped pecans evenly over the chocolate chips.

Bake the Bars:

Return the pan to the oven and bake for an additional 10-12 minutes, or until the chocolate is melted and the caramel is bubbly.

Remove from the oven and let the bars cool completely in the pan.