- In a medium saucepan, melt the butter over medium heat until golden brown and fragrant, stirring frequently. Remove from heat and let cool. 
- In a large bowl, whisk together the browned butter, brown sugar, and granulated sugar until smooth. 
- Add eggs one at a time, mixing well after each addition, followed by the vanilla extract. 
- In a separate bowl, whisk together the flour, baking soda, and salt. 
- Gradually add the dry ingredients to the wet ingredients, mixing until just combined. 
- Fold in the toffee bits and chocolate chips. 
- Chill the dough in the refrigerator for at least 30 minutes. 
- Preheat oven to 350°F (175°C). Line baking sheets with parchment paper. 
- Scoop dough into balls and place them onto the prepared baking sheets, spacing them 2 inches apart. 
- Bake for 10-12 minutes or until edges are lightly golden and centers are set. 
- Let cookies cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.