These Chocolate Chocolate Chip Cookies are totally scrumptious! They have a great texture, chewy (not cakey) interiors with slightly crisp edges. Their taste is not overly sweet, the bitter-sweet chocolate mellows out the sweetness and provides a rich chocolate flavor. The milk chocolate chips balance out the semi-sweet and bitter-sweet dough perfectly. If preferred, you may substitute white, semisweet, bittersweet, or even peanut butter chips for the milk chocolate chips called for in the recipe. When my mom made these, she would sometimes add 1/2 teaspoon espresso powder to enhance and deepen the chocolate flavor. On occasion, she would also add 1/2 cup toasted walnuts or pecans.