Preheat your oven to 350°F (175°C) and line a baking dish (9×9 inches) with parchment paper.
In a bowl, combine the crushed graham crackers and melted butter until well mixed. Press the mixture firmly into the prepared baking dish to form the crust.
Drizzle the sweetened condensed milk evenly over the crust.
Layer the chocolate chips, chopped nuts, and crushed toffee pieces on top of the condensed milk.
Evenly drizzle the caramel sauce over the top layers.
Bake in the preheated oven for 25-30 minutes, or until the edges are golden and the caramel is bubbling.
Let the bars cool completely in the pan before cutting them into squares. Store in an airtight container.
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