3/4 cup unsalted butter, melted and cooled to room temperature 1 cup light or dark brown sugar, firmly packed 1/2 cup granulated sugar 1 large egg 1 large egg yolk 2 teaspoons vanilla extract 1/2 teaspoon kosher salt 2 cups all-purpose flour 1/2 teaspoon baking soda 2 cups semisweet chocolate chips Mix butter and sugars until blended. Add egg, yolk, vanilla, and salt. Turn mixer to medium-high speed and beat until light and fluffy (1.5 to 2 minutes). In a separate bowl, whisk together flour and baking soda. Gradually incorporate dry ingredients into wet ingredients. Add chocolate chips. Chill dough for 30 minutes. Roll 1/4 cup blobs of dough into balls and place on parchment-lined baking sheet. Bake for 17 minutes at 325 degrees F. Allow cookies to cool on the pan for 10 minutes and on the parchment for another 5 minutes.
