Greetings from the Critique Club and welcome to the site.
This is a good first effort for a challenge. It definitely fit the criteria of the challenge.
A number of comments have already pointed out some the weaknesses.
The crop and angle are the two major points I see.
If you could bring the level of view up, to focus more on the cookies and the top part of the oven I think it will help. A little light on the interior of the oven would accent it. I could see using a smaller baking sheet with fewer cookies so you would have more space around your central theme.
I do think that the oven mitt is fine, it creates a sense of movement, your pulling the fresh cookies out of the oven. I might find a more neutral one though.
Strange how Your title contradicted the image u are trying to portray, I thought I felt that the cookies are COLD rather then freshly out of the oven... Lighting inadequacy??? i think it could be. Warmer coloured lighting will help.
Did you buy a baking tray just for this shot? And were those cookies really baked on it? It's still very clean ... kind of points up the dirty look of the oven behind them I fear.