Here are a couple cakes and things I have done over the past couple months...
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Barbie Cake: I used a medium sized Pyrex bowl to bake the "base" and then put a naked doll upper body on top, frosted the entire thing (the doll too).
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Yankee's cake: Freehanded the logo.
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US Capitol: One rectangle pan, one square pan, one mug of cake shaved/shaped post baking.
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For the elephants, I simply piped on the ears and nose, chocolate chips for the eyes and used the birthday candles for the tusks.
and here is the "doctored" up cupcake recipe that I always use:
1 box cake mix
1 cup sour cream
4 eggs
1/2 cup warm water
1/2 cup oil