Preheat oven to 350 degrees F. Line a large baking sheet with parchment paper or a Silpat baking mat and set aside.
In a medium bowl, whisk together the flour, baking soda, baking powder, and salt. Set aside.
In the bowl of a stand mixer or with a hand mixer, beat the butter and sugars together until creamy and smooth, scraping down the sides of the bowl with a spatula, if necessary. Beat in eggs and vanilla until combined.
With the mixer off, add the dry ingredients. Mix on low until just combined. Don’t over mix.
Stir in the chopped candy bars.
Roll 2 to 3 tablespoons of the dough into balls and place them on your prepared baking sheets, about 2 inches apart.
Bake for 10 to 12 minutes or until the edges barely start to brown. Let the cookies sit on the baking sheet for 3 to 5 minutes. You can gently press additional pieces of candy onto the tops of the cookies for looks. Sprinkle with sea salt.
Transfer the cookies to a cooling rack and cool completely.