Step 1

Preheat the oven to 350°F (177°C). Line a large baking sheet with parchment paper or a silicone baking mat and set aside.

Step 2

In a medium-sized mixing bowl using an electric mixer, beat the butter, brown sugar, and granulated sugar together for 1 to 2 minutes or until well combined.

Step 3

Mix in the egg yolk and vanilla extract until fully combined, stopping to scrape down the sides of the bowl as needed.

Step 4

Add the flour, baking soda, and salt and mix until just combined. Then, mix in the semi-sweet chocolate chips on low-speed until fully incorporated into the cookie dough.

Step 5

Cover tightly and transfer to the freezer to chill for 10 minutes.

Step 6

Using a 1.5 tablespoon cookie scoop, scoop the cookie dough onto the prepared baking sheet, making sure to leave a little room between each one.

Step 7

Bake for 10 to 12 minutes or until the edges of the cookies are lightly golden brown and the tops are set.

Step 8

Remove the cookies from the oven and allow to cool on the baking sheet for 5 to 10 minutes, then transfer the cookies to a wire rack to cool completely.