Grandma Val's Hot Fudge Sauce is seriously fudgy hot fudge sauce that firms up ever so slightly when poured over ice cream to form caramel-like ribbons of chocolatey goodness. Oh yes. It does.
Adapted gently from The Houghton College Community Cookbook submitted by Janet Spegen.
Stir the corn syrup and boiling water together in a heat-proof measuring cup then add to the pan with the sugar.