Whew! I can't catch a break lately! Sorry for the late post, but here are some ways to Frost a Mario Brother's party!
How fun are these huge characters?!? If you can't pull them off, how about the balloon clusters in the back, some smaller characters and some well placed stars! Source
How about chocolate lollipop mustaches! Source
How simple, yet perfect?!? Add green dots to eggs to create Yogi eggs! Source
Paper mushrooms are a must! Source
For favor boxes, paint boxes yellow and add a question mark for coin boxes! Source unknown
How cute would it be to make a Mario hat for each kid! Source and tutorial