Refrigerator Sandwich Cookies
["3/4 c. butter (1 1/2 sticks)", "1/4 c. firmly packed light brown sugar", "1/4 c. sugar", "1 egg yolk", "1 tsp. vanilla", "2 c. sifted all-purpose flour", "vanilla frosting", "pecan halves"]
["In mixing bowl, cream butter; gradually add sugars and beat until light and fluffy.", "Beat in egg yolk and vanilla.", "Gradually add flour.", "Chill for ease in handling.", "Form into 2 rolls, each 7-inches long and 1 1/2-inches diameter.", "Wrap in waxed paper and chill several hours.", "Cut into 1/8-inch slices and place on baking sheet.", "Bake at 350\u00b0 for 8 to 10 minutes.", "Remove to wire rack to cool.", "Put 2 cookies together with vanilla frosting; place dollop of frosting on top of sandwich and top with pecan half."]
["butter", "brown sugar", "sugar", "egg yolk", "vanilla", "flour", "vanilla frosting", "pecan halves"]