Preheat your oven to 350°F (175°C).

In a medium saucepan, melt the butter over medium heat until it turns golden brown, stirring frequently.

Remove the browned butter from the heat and let it cool slightly.

In a large mixing bowl, combine the melted butter with the brown sugar and granulated sugar, mixing until smooth and creamy.

Beat in the eggs one at a time, 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 mixture, stirring gently until just combined.

Fold in the toffee pieces and chocolate chips.

Drop rounded scoops of dough onto a parchment-lined baking sheet with space between each.

Bake for 10 to 12 minutes, until edges are golden brown and centers appear soft.

Allow cookies to cool on the baking sheet for a few minutes before transferring to a wire rack.