Preheat the oven to 350 degrees F.

Whisk together the flour, baking soda, and salt in a bowl and set aside. Melt butter in a saucepan over medium heat. The butter will begin to foam. Make sure you whisk consistently during this process. After a couple of minutes, the butter will begin to brown on the bottom of the saucepan. Continue to whisk and remove from heat as soon as the butter begins to brown and give off a nutty aroma. Immediately transfer the butter to a bowl to prevent burning. Set aside to cool for a few minutes.

With an electric mixer, mix the butter and sugars until thoroughly blended. Beat in the egg, yolk, vanilla, and yogurt until combined. Add the dry ingredients slowly and beat on low-speed just until combined. Stir in the chocolate chips.

Once dough is chilled, measure 1/4 cup of the dough into a ball. If the dough is too hard, let it sit out at room temp for 20-30 minutes or until you can roll the dough into balls It doesn't have to be perfectly rolled. Place dough balls on cookie sheet, 2 inches apart and sprinkle each dough ball with a little bit of sea salt.

Bake the cookies 9-11 minutes or until the edges of the cookies begin to turn golden brown. They will look a bit underdone in the middle, but will continue to cook once out of the oven. Cool the cookies on the sheets and sprinkle with a little extra sea salt if desired. Remove the cooled cookies from the baking sheets after a few minutes and transfer to a wire rack to cool completely.