Preheat your oven to 350°F (175°C).

In a large mixing bowl, combine the butter, granulated sugar, and brown sugar. Beat on medium speed until light and fluffy.

Add the egg and vanilla extract, mixing until well combined.

In a separate bowl, whisk together the flour, baking soda, and salt. Gradually add this to the wet mixture until just combined.

Fold in the toffee bits gently using a spatula.

Drop rounded balls of dough onto a prepared baking sheet, spacing them 2 inches apart.

Bake for 10-12 minutes until the edges are lightly golden. Let cool for 5 minutes.

(Optional) Drizzle melted chocolate over the cooled cookies before serving.