Preheat oven to 325 degrees.
In a medium bowl, combine the flour, baking soda and salt. Whisk until ingredients are well combined, then set aside.
In a large bowl with a spatula, or a stand mixer with the paddle attachment, add the butter, sugar, brown sugar, and vanilla and cream together until light and fluffy, about 3-4 minutes.
Add the eggs one at a time, mixing them in after each addition. You may need to stop and scrape the bottom and sides of the bowl to make sure you combine everything.
Add the flour mixture and mix on low until just combined, then add the chocolate chips and all but ½ cup of the toffee bits. Mix gently by hand using a rubber spatula, making sure to scrape the bottoms and sides of the bowl and combine all ingredients well.
Using a small ice cream scoop, or a spoon, scoop and roll dough into 1 ¼" balls. Line them up a couple inches apart on a baking sheet lined with parchment paper or a Silpat. Use the palm of your hand to press the balls down down so the dough ball is about ¾" thick.
Bake for 10-12 minutes, or until the edges begin to turn lightly golden brown. Once baked, remove from the oven and sprinkle the reserved Toffee Bits on top of the cookies.
Let the cookies cool on the baking sheet for a couple minutes before moving them to a wire rack to cool completely. Enjoy!