Fudge Sauce

Directions

1. 1
   Heat the butter and chocolate in double boiler over simmering water until melted.
2. 2
   Stir in salt, then sugar in 4 or 5 portions being sure to blend in sugar thoroughly after each portion.
3. 3
   The mixture becomes very thick, dry and grainy.
4. 4
   Now stir in milk very slowly, then cook 5 or 6 minutes longer until slightly thickened, stirring often.
5. 5
   Remove from heat. Stir in vanilla.
6. 6
   Pour into glass jars with tight fitting lids. Cover and cool, then store in refrigerator.