Don't be a grumpy cupcake T-Shirt Posted on 2013/02/06 by admin Don't be a grumpy cupcake. Original artwork design of a terribly angry looking, but delicious cupcake on a rampage. A shirt for anyone who loves cupcakes and sunshine product tags: don't, grumpy, cupcake, design, baking, bakery, grumpiness, icing, angry, rampage,