Old fashioned greek shortbread

Ingredients:

1 pound butter (no margarine)
2 egg yolks
1 cup confectioners sugar
1 teaspoon anise
4 to 5 cups flour

Preparation:

Beat butter at medium speed of electric mixer for 10 minutes.
Add egg yolks and confectioners sugar. Beat 5 more minutes.
Add anise. Add flour one cup at a time, kneading.
Roll dough into 1-inch balls and bake on ungreased cookie sheet at 375 degrees F for 12 to 15 minutes or until very lightly browned.
Dust with confectioners sugar.