Another version from this box.
For more on the history of fudge, see the recipe from earlier in this box.
From the box of A.D. from Lutz, Florida, by way of Pennsylvania in the 1940s, and originating in Ohio in the 1920s.
2 cups sugar
1 cup milk
2 squares chocolate
1/4 tsp. vanilla
1 Tbsp. butter
1/8 tsp. cream of tartar
Boil ingredients together to soft ball stage. Add vanilla.
Beat until it begins to stiffen. Pour into buttered pans and mark into squares.