I've posted this recipe for One Bowl Chocolate Cake before but in a totally different Advertisement. I found both of these ads for the same product--two different brands, same product: Crown Brand Corn Syrup (Canada) and Karo Corn Syrup (U.S.). Thought you'd like the comparison. The First Advertisement emphasizes the Cake -- "A Delicious One Bowl Chocolate Cake." The Second is all about the Marshmallow Frosting--"At last...an easy "No-Cook" Marshmallow Frosting!" Same Cake photo, although the first frosting recipe is for Chiffon Frosting, while the second is for Marshmallow Frosting. Both recipes below!