KATHRYN:
Good Evening. In Feb. 18th last, Kelly/Wash posted a birthday cake as you described with the addition of marshmallows. (Hot Chocolate Cake with Marshmallows)
If this does not impress you.... I can post LADY Godive Hot Chocolate Cake for you. Have a nice day young lady.
~Chef Dunask.

Editor's note:
Cass - I think that this recipe you posted previously is the one Kathryn is looking for:
Chocolate Pudding Cake