Lemon butter frosting

MMMMM----- Recipe via Meal-Master (tm) v8.02
  
       Title: Lemon Butter Frosting
  Categories: Toppings, Cakes
       Yield: 1 servings
  
       1 ts Lemon rind (grated)
       6 tb Butter
       3 c  Confectioners' sugar; sifted
     1/4 c  Lemon juice (approximately)
       1 ds Salt
  
   Add lemon rind to butter; cream well Add part of the sugar gradually,
   blending after each addition. Add remaining sugar, alternately with
   lemon juice, until right consistency to spread. Beat thoroughly after
   each addition. Add salt. Makes enough frosting to cover tops and
   sides of two 9-inch layers or tops and sides two 8x8x2-inch layers.
   
   From the Kate Smith Collection, 1940. General Foods Corp. (Courtesy
   of Barb Day)
  
 MMMMM