1 cup butter, softened 
2 cups packed brown sugar 
2 large eggs, room temperature 
1 cup buttermilk 
3/4 teaspoon root beer concentrate or extract 
4 cups all-purpose flour 
1 teaspoon baking soda 
1 teaspoon salt 
1-1/2 cups chopped pecans 
FROSTING:
3-1/2 cups confectioners' sugar 
3/4 cup butter, softened 
3 tablespoons water 
1-1/4 teaspoons root beer concentrate or extract
1. In a large bowl, cream butter and brown sugar. Add eggs, 1 at a time, beating well after each addition. Beat in buttermilk and root beer concentrate. Combine the flour, baking soda and salt; gradually add to creamed mixture. Stir in pecans. 
2. Drop by tablespoonfuls 3 in. apart onto ungreased baking sheets. Bake at 375° for 10-12 minutes or until lightly browned. Remove to wire racks to cool. In a small bowl, combine frosting ingredients; beat until smooth. Frost cooled cookies.
TOTAL TIME: Prep: 20 min. Bake: 10 min./batch + cooling 
YIELD: 6 dozen. 
Note: Flavor is said to improve the next day.
Nutrition Facts
1 cookie: 130 calories, 6g fat (3g saturated fat), 17mg cholesterol, 96mg sodium, 18g carbohydrate (12g sugars, 0 fiber), 1g protein.