Begin by gathering your ingredients. Crush the graham crackers into fine crumbs using a food processor or a rolling pin, and set aside in a mixing bowl.

Preheat your oven to 350°F (175°C) during this step to ensure it’s ready when you assemble the bars.

In a medium saucepan, combine the butter and brown sugar over medium heat. Stir continuously until the mixture reaches a gentle boil, then gradually add the sweetened condensed milk.

Continue to cook while stirring until the caramel thickens to a soft ball stage, approximately 230°F (110°C).

Remove the saucepan from heat and immediately mix the crushed graham crackers into the caramel mixture, stirring well until all the crumbs are fully incorporated.

Transfer the caramel cracker mixture into a greased 9x9-inch baking pan and press evenly into the bottom with a spatula.

Bake in your preheated oven for 25-30 minutes, or until the edges turn a lovely golden brown.

Once baked, remove the pan from the oven and let it cool completely on a wire rack for at least an hour before slicing.