Ingredients
For the Cookies
3/4 cup firmly packed brown sugar
1 cup butter, softened
1 egg yolk
2 cups flour
For the Frosting
2 Tablespoons butter
1 1/4 powdered sugar
1/2 teaspoon vanilla
4 - 5 teaspoons milk
Instructions
In large bowl, combine brown sugar and 1 cup butter. Beat until light and fluffy. Add egg yolk; blend well. Add flour and mix well. Cover with plastic wrap and refrigerate for 15 minutes for easier handling.
Heat oven to 325. Shape dough into 1-inch balls. Place two inches apart on ungreased cookie sheets. Flatten with a 1.5 inch circle with a fork dipped in flour.
Bake for 10 - 14 minutes or until light golden brown. Cool one minute; remove from cookie sheet. Cool completely before frosting.
To prepare frosting, heat 2 Tablespoons butter in medium saucepan over medium heat until light golden brown, stirring constantly. Remove from heat. Stir in remaining frosting ingredients, adding enough milk for desired spreading consistency. Blend until smooth. Spread a scant one teaspoon of frosting between two cooled cookies. Repeat with remaining cookies. makes 30 cookies.