Martha's Chocolate "Surprise" Cookies

How about these soft CHOCOLATY cookies to wow your sweetie? Thank you MARTHA STEWART for sharing this great recipe! My husband and I can't get enough of these little beauties.

• Martha's Chocolate "Surprise" Cookies
• 1 3/4 cups all-purpose flour
• 3/4 cup cocoa powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon salt
• 1/2 cup (1 stick) unsalted butter, softened
• 1 cup sugar
• 1 large egg
• 1/2 cup milk
• 1 teaspoon pure vanilla extract
• 12 large marshmallows, cut in half horizontally
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• Chocolate Frosting
• • 2 cups confectioners' sugar
  • 4 tablespoons (1/2 stick) unsalted butter, melted and cooled
  • 1/4 cup cocoa powder
  • 1/4 cup milk
  • 1/4 teaspoon pure vanilla extract
  • 
    
  • Preheat oven to 375 degrees. In a medium bowl, whisk together flour, cocoa powder, baking soda, and salt; set aside. 
  • In the bowl of an electric mixer fitted with the paddle attachment, cream together butter and sugar until light and fluffy, about 2 minutes. Add egg, milk, and vanilla, and beat until well combined. Add reserved flour mixture; mix on low speed until combined.
  • Using a tablespoon or 1 3/4-inch ice cream scoop, drop dough onto ungreased baking sheets, about 2 inches apart. Bake until cookies begin to spread and become firm, 10 to 12 minutes.
  • Remove baking sheets from oven, and place a marshmallow, cut-side down, in the center of each cookie, pressing down slightly. Return to oven, and continue baking until marshmallows begin to melt, 2 to 2 1/2 minutes. Transfer cookies to a wire rack to cool completely before frosting.
  • Spread about 1 tablespoon of frosting over each marshmallow, starting in the center and continuing outward until marshmallow is covered.