1. Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking pan or line it with parchment paper for easy removal.
2. In a large mixing bowl, combine the cake mix, melted butter, eggs, vanilla extract, and salt. Stir until a thick batter forms.
3. Fold in the toffee bits and chocolate chips, ensuring they’re evenly distributed throughout the batter.
4. Spread the batter evenly into the prepared baking pan, using a spatula to smooth the top.
5. Bake in the preheated oven for 25-30 minutes, or until the edges are golden brown and a toothpick inserted in the center comes out clean.
6. Allow the bars to cool completely in the pan on a wire rack before cutting into squares.
7. Serve and enjoy the sweet, buttery goodness!

As my abuela always said, “Cooking is an art, not a science.” So feel free to adjust the baking time slightly based on your oven and desired level of gooeyness. Remember, the joy is in the process as much as the result.