Chocolate Thumbprint Cookies

• ½ cup butter, softened
• 1 egg, separated
• 2/3 cup sugar
• 1 tsp vanilla
• 2 Tbsp milk
• 1 cup all purpose flour
• 1/3 cup Hershey's Cocoa
• ¼ tsp salt
• ½ cup nuts, chopped
• 24 Hershey kisses...I like Hug's white and regular chocolate

• ½ cup powdered sugar
• 1 Tbsp butter, soft
• 2 tsp milk
• ¼ tsp vanilla

• Beat butter, egg yolk, sugar, vanilla and milk until fluffy.
• Stir together flour, cocoa & salt then gradually add to the butter mixture, beat until blended.
• Refrigerate at least one hour.
• Spray cookie sheet or use parchment paper.
• Shape dough in 1" balls.
• Beat egg white and dip each ball. Roll in nuts. Place on cookie sheet and press thumb in center to form a small cavity for the filling.
• Bake 350° for 10 - 12 minutes.
  
  Vanilla Filling
  Beat powered sugar, butter, milk and vanilla until well blended.
  
  Move cookies to a wire rack and cool for 5 minutes.
  Spoon ¼ tsp vanilla filling into each thumbprint cavity.
  Gently press a kiss or hug on top of filling.
  Cool cookies completely.