Step 1: Preheat your oven to 350°F (175°C).
Step 2: Line a 9x13-inch baking pan with parchment paper.
Step 3: Cream together the softened butter and granulated sugar until light and fluffy. Add the egg and vanilla extract, mixing until well combined.
Step 4: In another bowl, whisk together the all-purpose flour and salt. Gradually add this mixture to the wet ingredients, mixing until just combined.
Step 5: Spread the shortbread mixture evenly into the prepared baking pan and bake for 15-20 minutes or until the edges are lightly golden. Allow to cool slightly.
Step 6: In a saucepan over low heat, combine the chewy caramels, salt, and whole milk. Stir until melted and smooth. Fold in the shredded coconut.
Step 7: Spread the caramel coconut mixture evenly over the cooled shortbread base.
Step 8: Return the pan to the oven and bake for an additional 15-20 minutes or until bubbly and golden.
Step 9: Melt the chocolate chips using a double boiler or a microwave.
Step 10: Drizzle the melted chocolate over the top and allow it to set.
Step 11: Once set, lift the bars from the pan and slice them into squares or rectangles.