Step 1: In a large bowl, make up cake batter for both cake mixes. *Optional – for a more dense and moist cake substitute half of the water for the same amount of sour cream.Grease and flour an 8" pan and a ceramic medium oven-safe bowl or a medium-sized and small glass oven-safe bowl (see notes above). Spray pans with cooking spray (or grease with butter) and dust lightly with flour. Turn upside-down and tap the bowl to get rid of excess flour. Step 2: Fill with batter until they are a little over ¾ full. Use remaining batter for cup cakes.Bake at 325 for about an hour or until the center feels set (checking after 30 minutes). If you are using a cake pan for one of the layers, check after 20 minutes. Step 3: About 10 minutes after you remove the cake from the oven, turn out of bowl onto wax paper. This prevents the cake from sweating and sticking to the bowl.Stick the cakes in the freezer for a few hours or overnight until they are really firm.Layer the small cake onto the large cake and trim any over hang. Step 4: Stick your Barbie princess in the center of the cake and frost over her upper half to make it look like a dress.
Step 5: Layer with a thin layer of frosting to create a "crumb coat".
Step 6: Make frosting (see link above) and decorate.
