I don't use patterns and I make different models every time. I think is better to improvize and go with the flow when you try to make a muffin or a cupcake because they are don't have perfect shapes in real life and they are more beautiful and more realistic if you make them less perfect when using amigurumi tehnique. I uploaded some step by step pictures and I hope you understand what I mean.
You can make a little purse or wallet out of your cupcakes. You can also use polymeric clay on your stuffed cupcakes. Make sure you use light colors. I hope you like my instructable and maybe you can vote for me on Amigurumi Challange. Thank you