From my copy of the 1961 Betty Crocker New Picture Cookbook, page 199
Butter Cookies
"From Ischl, a famous Austrian resort, comes this rich cooky,
contributed by Antal Dorati, internationally known conductor,
to "Encore", the cookbook of favorite dishes of famous
musicians, 1958 by Random House"
1 cup soft butter
2 cups Gold Medal flour
1/2 cup sugar
1 cup finely chopped walnuts
Heat oven to 350-F (mod.). Measure flour by dip-level-pour
method or by sifting. (see p. 6). Combine all ingredients;
blend well. Roll on floured cloth-covered board to 1/4-inch.
Cut with 1-1/2 inch cooky cutter. Place on ungreased baking
sheet. Bake 10 to 12 min., until set but not brown. Cool.
Frost cookies with a bitter** chocolate icing or put together
with raspberry jam. Makes 8 doz. cookies.
**The cookbook says "bitter chocolate icing", but only a "butter chocolate icing" is listed in the index. "Bitter" must be a typo in the original text?
Here's the Butter Chocolate Icing recipe from page 172
Butter Icing - For extra richness, add 1 egg yolk.
1/2 cup soft butter
3 cups sifted confectioners' sugar
about 3 tbsp cream
1-1/2 tsp vanilla
Blend butter and sugar together. Stir in cream and vanilla
until smooth. Makes frosting for two 8" or 9" layers or
13x9" oblong.
Chocolate Butter Icing
Make Butter Icing (above) - except stir 3 sq. unsweetened
chocolate (3 oz), melted, into blended mixture.