Wow, it's like that time I saw someone else end an email with "Re**t**ards" instead of "Re**g**ards". I'm not sure he's aware of his typo to this day. While I've never done it, I admit I've sometimes thought about it, even prior to that case :)

As @GrayCygnus commented:

> and N are **wayy** to close each other on Qwerty keyboards

which is true and also applies to letters `g` and `t` in my coworker's slip above.

I can say it was so *obvious* to me that it had been a typo, that I never even mentioned anything and never observed anyone even talking about it.

That said, just send a simple email apologizing for the typo. Keep it short and simple.

> What approach could I take to apologize for my typo?

My suggestion is:

    Hi all,

    I just realized I made an unfortunate typo in my
    previous email and wanted to apologize.

    I meant to say that <insert whatever here>
    was **B**igger.


    Best Regards,
    <your name>

Make sure you send it to the exact same audience.

----

> In addition, one member of the audience is African - American.

I'd suggest not assuming that just because someone is black, they must also be "African" too. There's a lot of black people having nothing to do with Africa in a bunch of other places in and outside of the US. If they're US Citizens, they're just Americans. That's it. :)

> Did I damage my professional image at my company?

I don't think so, if we can assume everyone is reasonable. Much less so if you send a simple apology noting that it was an unintended typo. Do not grow your simple typo into an incident of epic proportions.