11.5 oz. milk chocolate chips
1 tsp. kosher salt (scant)
1 tsp. baking soda
1/4 cup cornstarch
1 1/2 cups all-purpose flour
1 egg yolk, large
1 egg, large
1/4 cup granulated sugar
3/4 cup light brown sugar, loosely packed
3/4 cup unsalted butter (1 1/2 sticks), softened
1 cup creamy peanut butter