Step 1

Preheat oven to 350°F. Line two baking sheets with parchment paper.

Step 2

In a small bowl combine flour, baking soda, and salt. Set aside.

Step 3

In a large bowl, using a hand mixer or stand mixer with the paddle attachment, beat butter and both sugars for 2 minutes, scraping the bowl as needed.  Add egg and vanilla and beat until combined, scraping the bowl and beater(s) as needed. Add the flour mixture, beating until just combined. Add 1 cup butterscotch chips and stir by hand until combined.

Step 4

Scoop 2-tablespoon portions of dough and place the dough balls a couple inches apart on the baking sheets. Sprinkle the top of each dough ball with flaky salt. Bake the cookies for 9-11 minutes, until the edges are beginning to turn golden brown and the center is still slightly underdone. If necessary, rotate the baking sheets halfway through cooking time, so that the cookies brown evenly. Make sure not to over bake; the cookies should be soft enough that you cannot pick them up off the baking sheet when they are fresh out of the oven (they will firm up as they cool). Place the baking sheets on wire racks to cool completely. If desired, you can gently place a few extra butterscotch chips onto the top of each cookie when they are fresh out of the oven.