FOR THE FILLING: – 6 ounces (170g) cream cheese, at room temperature – 3 tablespoons (20g) confectioners' sugar FOR THE COOKIES: – 2 & 1/4 cups (270g) all-purpose flour – 1/2 teaspoon baking soda – 1/2 teaspoon salt – 3/4 cup (170g) unsalted butter, melted and slightly cooled – 1 cup (200g) firmly packed light brown sugar – 1/3 cup (67g) granulated sugar – 1 large egg – 1 egg yolk – 1 teaspoon vanilla extract – 2 cups (340g) semisweet chocolate chip