Boil brown sugar, molasses, cream and butter together, stirring all the time,
until the sugar dissolves. Continue boiling without stirring until a soft ball is
formed when a drop is placed in cold water.
Remove from the heat, add the vanilla extract and nuts, and stir the mixture
until it begins to crystallize.
Drop spoonsful of the mixture in small heaps onto
buttered baking sheets, leaving enough room between the pralines for them to spread