Warm Chocolate Fudge Sauce

Photo by Chelsea Kyle
This is the easiest hot fudge sauce ever. You'll be glad to know that it firms up to that chewy fudge consistency on contact with ice cream, just as you expect hot fudge sauce to do!
Cooks' note:
•Sauce can be made 5 days ahead and chilled, covered. Reheat over low heat, stirring, and thin slightly with water, if necessary.