Preheat your oven to 350°F (175°C) and grease a 9x13 inch baking pan.
In a mixing bowl, beat together the butter, flour, and brown sugar until crumbly.
Press this mixture evenly into the prepared pan to form the base. Bake for 15 minutes.
While the base bakes, melt the caramel bits and 2 tablespoons of milk in a saucepan over low heat, stirring until smooth.
Pour the melted caramel evenly over the baked crust.
Sprinkle chopped pecans over the caramel layer.
Return the pan to the oven and bake for another 10–12 minutes.
Remove from oven and immediately sprinkle with chocolate chips. Let them sit for a few minutes, then gently spread the melted chocolate with a spatula.
Cool completely before cutting into bars. Try not to eat them all in one sitting (good luck!).