Preheat your oven to 350°F (175°C) and grease a 9×13 inch baking pan or line it with parchment paper for easy removal.

In a medium saucepan over low heat, melt the butter. Once melted, remove from the heat.

Stir in the granulated sugar until well combined. Then, add the eggs one at a time, mixing well after each addition, followed by the vanilla extract.

In a separate bowl, whisk together the flour, cocoa powder, and salt. Gradually add this mix to the wet ingredients, stirring until just combined.

Gently fold in the toffee bits, reserving some for sprinkling on top later.

Pour the brownie batter into your prepared pan and spread evenly. Sprinkle the reserved toffee bits on top for an extra crunchy layer.

Bake for 25-30 minutes or until a toothpick inserted into the center comes out with a few moist crumbs.

Let the brownies cool in the pan for at least 20 minutes before slicing them into squares. Enjoy!