How To make Swedish Ammonia Cookies Drommar (Swedish Dreams)

1 c Butter
1 1/8 c Sugar
2 c Flour; enriched - sifted
1 ts Ammonia salt
1 ts Vanilla
Cream the butter; add sugar and cream thoroughly, using an electric beater if possible. Beat in the sifted flour, ammonia salt, and vanilla. Put in refrigerator for a few hours, then shape into small balls and bake in a slow oven (300 F). Source: Mary Margaret McBride Encyclopedia of Cooking (c) 1958, Homemakers Research Institute, Evanston, Il.