The phrase "admittedly created" is correct and usable in written English.
It can be used when acknowledging the origin or authorship of something, often with a sense of honesty or concession.
Example: "The artwork, admittedly created during a moment of inspiration, reflects the artist's true emotions."
Alternatives: "acknowledged to be created" or "openly created".
Their paintings are, admittedly, created out of theological sympathy rather than discontent.
We now operate in an organizational structure — admittedly created with the best of intentions — that has become overly bureaucratic.
As a child born to an alcoholic prostitute and a drug-dealing pimp, McMillan admittedly created a lot of trouble and chaos when she was younger.
Admittedly, this creates a lopsidedness that is not to the play's advantage.
Our talking-head, confessionalist media culture, which she admittedly helped create, demands of us a dedication to one-side-or-the-other opinions and perspectives.
Admittedly, the cacophony created by thousands of brass and percussion instruments all throbbing away can exhaust even a diehard Balkan brass nut, and the relentless force field of sound battered my senses.
Foreign direct investment has quadrupled, tax collection has improved and at least 4 million new jobs have been created - admittedly far too few in a country of 102 million people.
Noah's (admittedly bad) jokes created concern over his role as future host of "The Daily Show," and he was participating in the medium on which the conversation occurred.
So, for my second recipe, I've created an admittedly unhealthy treat complete with caramel, dates, pecans and shortbread – my love letter to this amazing fruit.
His Marc Jacobs show for autumn/winter 2012 saw models sporting a distinctive and mildly gothic look (admittedly hidden under ginormous hats) created by the NARS team.
Admittedly, at that time, he created the inside of a jet (first-class seats, bien sûr), and it was for the couture show, but still.
