Glad to hear that on at least some Airbus DEN-hub flights the cookies are warm. All the Airbus-operated flights out of the legacy YX system I've been on have had warm cookies, but I'm less certain about flights out of DEN.
I really reject the arguement that I've heard here and there that some F/A refuse to serve the cookies, or refuse to heat them because that's too much bother or they can't do it without burning themselves. I'm hopeful those sorts of comments are overblown or perhaps even baseless anecdotal accusations that take a life of their own on the web.
Everybody has good and bad days. And I'm not saying that conducting inflght service is a breeze nor a pleasure, but when that's a key component of your job, you should not be allowed to simply decide not to do it. I've had a few crews on nearly-full A319 do a "15" on a scale of 1-10 for inflight service. Issues of catering, equipment and excessive turbulence aside, I'd like the crews to at least muster a 6 or 7 flight after flight.
So...reports of warm cookies out of the DEN side of the system are a good thing!