For Cookies In a large bowl combine the sugars, butter, buttermilk, eggs, root beer extract and vanilla. Beat at medium speed until fully blended. Add flour, baking soda and salt; beat on low speed until soft dough forms. Drop dough onto lightly greased cookie sheets, 2 inches apart. Bake in 375-degree oven 10 to 12 minutes. Remove from sheet and cool completely. Makes 4 to 5 dozen. Frost when completely cool.

For The Frosting

Combine sugar, butter or margarine, milk or cream and root beer extract in a small mixing bowl. Beat at low speed until smooth, adding more milk in small amounts, if needed to make frosting spreadable. Frost tops of cooled cookies.