Once upon a time I went to a dinner where they served this awesome cake and I finally made it for Father's Day. This is a great one to do with the kids.
First make Hot Fudge Sauce or buy some. Mine favorite comes from Our Best Bites.
You melt a 1/2 a stick of butter and a can of Sweetened condensed milk. Stir often. When the butter is melted you add 1/2 cup chocolate chips until those melt and everything is creamy deliciousness. Let this cool.