Plain Chocolate Caramels

Chocolate,4 squares
Sugar (brown),1 cup
Corn syrup,1 cup
Milk,1 cup
Butter,1 heaping tablespoon
Flavoring (vanilla),1 teaspoon

Betsey let the chocolate, sugar, syrup and milk boil until they formed a hard ball in cold water, added the butter just before removing from the fire, then the vanilla, and poured into buttered pan, marked in squares when sufficiently cool, cut with a sharp knife when cold and wrapped in waxed paper.