Bloomin onion as Claire says is Outback but a few other places do similar or their own versions.
This is pic of one at Texas Roadhouse, they do 2 sizes ($3.99 & $5.99 I think) This is the bigger one, too much for 3 of us, last time we had smaller much better size.
Oh I want one now! Last time we had one was at the Outback yummy! I bought a bloomer maker at a store in the premium outlet malls and I had to buy a deep fat fryer too as I did not have one , I tried to make them at home but they were never as good as the one's in Orlando!
That would be the Awesome Blossom! definitely awesome, imho better than the Bloomin' Onion! However I don't think that they offer it anymore, mores the pity!