These are a favorite around my house. I just use a 2 inch scalloped edge cookie cutter to make mine and I get over 9 dozen cookies from one batch! Also so I get perfectly uniform cookies I take and place a 1/4 inch dowel on either side of the dough I'm going to roll out and run my rolling pin over them. It makes for a perfect thickness and every cookie is just perfect! Enjoy
Preheat oven to 350. Line cookie sheets with bakers parchment paper.
Sift together flour, cocoa powder, salt and baking powder. Set aside.
Combine sugar and butter in mixing bowl and beat till creamy. Add eggs and beat till light and fluffly. Now beat in the sour cream and vanilla extract.
Add all dry ingredients to the creamed mixture and stir together.
Now take about 1/3rd of the dough and roll out to about 1/4 of an inch thick and cut into desired shapes and place on cookie sheet. I use a 2" round scalloped edge cookie cutter. Bake at 350 for 8 minutes. It's not necessary to refrigerate the dough first.
While cookies are cooling make your icing.
In mixing bowl combine butter, shortening, powdered sugar and vanilla. Using flat paddle mix well, add milk to thin to spreading consistency. Beat for 8 minutes, than add melted chocolate and beat another 5 minutes.
Frost cooled cookies and enjoy! Store cookies in an air tight container for future enjoyment.