Ingredients:
Cookie Dough :2 cups all-purpose flour
1 cup sugar
3/4 cup milk
1/2 cup unsweetened cocoa
6 tablespoons butter or margarine, melted
1 teaspoon baking soda
1 teaspoon vanilla extract
1/4 teaspoon salt
1 large egg
Marshmallow Creme Filling:
6 tablespoons butter or margarine, slightly softened
1 cup confectioners' sugar
1 jar (7 1/2-ounce) marshmallow creme
1 teaspoon vanilla extract
Directions:
1. Preheat oven to 350 degrees F. Grease 2 large cookie sheets.
2. Prepare the Dough: In a large bowl, with a spoon, mix all dough ingredients until smooth.
3. Drop dough by heaping tablespoons, 2 inches apart, on each prepared cookie sheet. There will be 12 rounds per sheet. 
4. Bake 12 to 14 minutes. With a wide spatula, transfer cookies to wire racks to cool completely. 
5. Prepare Marshmellow Creme Filling: In a large bowl, with mixer at medium speed, beat butter until smooth. Reduce speed to low; gradually beat in confectioners' sugar. Beat in marshmallow creme and vanilla until smooth. 
6. Spread 1 rounded tablespoon filling on flat side of 12 cookies. Top with remaining cookies. 
Happy baking,
Sunny & Star