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.