Preheat the oven to 350 degrees. Line 2 cookie sheets with parchment paper and set aside.

In a small saucepan, add the butter and dark brown sugar. Stir until smooth and creamy. Allow to cool to room temperature.

Using a hand mixer on medium speed, beat in the egg and vanilla. Scrape down the sides of the bowl and beat in any remaining bits.

Add the flour and baking soda. Mix until well combined. Scrape down the sides of the bowl.

Fold in the butterscotch chips until evenly distributed.

Use a 2 tablespoon cookie scoop, scoop the dough into nice rounded dough balls and place them 1 inch apart on the prepared cookie sheet.

Place in the preheated oven and bake for 10 minutes.

Remove from the oven and allow to cool on the cookie sheet for 10 minutes.

While the cookies are hot, gently push 3 to 4 butterscotch chips on the top of the cookies.

Place on a paper towel or cooling rack until cooled completely.

Store in an airtight container at room temperature.