I know, I know...this is heresy, but my mother just made a cake from The Cake Doctor book called Orange Dreamsicle: 1 pkg. yellow cake mix, 3/4 cup Miracle Whip salad dressing, 1 pkg. (1.3) whipped topping mix, 3/4 c fresh orange juice, 3 large eggs, 2 tbsp. grated orange zest. Everything was beaten in the mixer on medium for 3 min. She then painted the layers with a simple syrup flavored with peel, then a sugar/oj glaze. It was actually quite flavorful, and for a home baker, it was very easy.
If you are using boxed fondant, such as Wilton's, PLEASE FOR THE SAKE OF YOUR GUESTS, flavor it. Knead in some almond, orange or some type of extract. Most American's do not care for the taste of it, and Wilton's has
a chemical aftertaste. A lot of people peel it off the cake.
For more help with fondant, go to
www.baking911.com. Everything you wanted to know about fondant that you never thought of asking. They also have a recipe for rolled buttercream you might like better. Also, go to Wilton's discussion forums. All levels of cake bakers to answer your questions. Good luck.