Make Classic Chocolate Cookie dough with 3 eggs and 3/4 teaspoon baking powder total; add 6 ounces melted semisweet chocolate with the eggs. Roll into balls and bake 6 to 8 minutes at 375 degrees; cool slightly. Flip over half the cookies, top each with a marshmallow and return to the oven to soften, 2 minutes. Top with the remaining cookies.
Recipe courtesy Food Network Magazine