3/4 cup butter, softened

3/4 cup powdered sugar

1/2 tsp. vanilla

1 egg yolk

1 1/4 cups all-purpose flour

1/2 cup hazelnuts, ground

1 egg — beaten

1/4 cup chopped hazelnuts

1/4 cup white coarse sugar crystals (decorating sugar)

 

Beat butter and powdered sugar in large bowl with electric mixer on medium speed until light and fluffy, or mix with spoon. Stir in vanilla and egg yolk. Stir in flour and ground hazelnuts until well blended. Cover tightly and refrigerate 1 hour. Heat oven to 350 degrees. Roll one fourth of dough at a time 1/4 inch thick on lightly floured surface. (Keep remaining dough refrigerated until ready to roll.) Cut into 2 1/2-inch rounds. Place about 2 inches apart on ungreased cookie sheet. Brush with egg. Sprinkle with chopped hazelnuts and sugar crystals. Bake 8 to 10 minutes or until edges are light brown. Remove from cookie sheet to wire rack.