Hoping someone can help me change my username from Cake Co to Sweetie Di? keep on caking!
It looks like that option is not available.
When you're viewing your own Profile page, there is a button that says "Edit Account." From there it's very easy to reset your password, email address, and other account details. At this time, you cannot change your user name after you have registered. For more information on how to edit your user profile, head over to our Community Profile Tutorial.
You could try contacting one of the moderators directly and asking them if there is another option. (Possibly deleting your account and creating a new one?)