Chocolate Shortbread

1 1/2 cups flour

1/2 cup cocoa

1 cup butter

1 cup powdered sugar

1/4 tsp salt

1 tsp vanilla

Preheat oven to 350 F.  In a large bowl with mixer at medium speed, beat first 6 ingredients until mixed, occasionally scraping bowl.

Roll into 1" balls.  Dip cookie stamp in sugar then stamp cookie.

Bake about 10 minutes.