Choc. Cake-Cookie Rounds

Very refreshing for the summer with the mint taste!

2 cups all-purpose flour
1/2 cup Dutch-process cocoa powder
1 1/4 teaspoons baking soda
1 teaspoon salt
1 cup well-shaken buttermilk
1 teaspoon vanilla
1 stick (1/2 cup) unsalted butter, softened
1 cup packed brown sugar
1 large egg
 Preheat oven to 350°F. Whisk together flour, cocoa, baking soda, and salt in a bowl until combined. Stir together buttermilk and vanilla in a small bowl.
Beat together butter and brown sugar in a large bowl with an electric mixer at medium-high speed until pale and fluffy, about 3 minutes in a standing mixer or 5 minutes with a handheld, then add egg, beating until combined well. Reduce speed to low and alternately mix in flour mixture and buttermilk in batches, beginning and ending with flour, scraping down side of bowl occasionally, and mixing until smooth.
Spoon  mounds of batter (I used one rounded tablespoon) about 2 inches apart onto 2 buttered large baking sheets. Bake 11 to 13 minutes. Cookies will be done when they spring back when gently touched. Be careful not to over-cook. Transfer with a metal spatula to a rack to cool completely.

Mint Flavored Buttercream Frosting (Chockylit)

1 cup (2 sticks) butter, softened
4-5 cups powdered sugar, sifted
1/4 cup milk
1/4 tsp all natural peppermint extract (You may use more or less depending on your taste preference.)
Beat butter until creamy, scrape bowl. Add 4 cups of sifted powdered sugar, milk, and peppermint extract, beat until combined.Add more powdered sugar as needed to get piping consistency.
To Assemble
Fill a pastry cone or plastic bag with the icing and attach your desired pastry tip. Pipe generously onto a cake round, covering the entire surface, and top with another cake round. Alternately, you can pile on the frosting with a spoon and smooth out with a knife. Continuing this process until all the pies are assembled.