I use the Carrot Cake recipe III but now I can't find it here or on Epicurious...
Thanks for nay advice.
I used the same recipe and the same thing happened to me! This is the first time I used this recipe and I used (2) 8" round pans. I figured it would take less time to bake than a 9" by 13", so I put it in for 30 mins and checked on it through the window often. As it baked it rose nicely, but near the last 10 minutes it started in sink in the middle. I did not open the oven at all while it was baking. I tested them with a toothpick and it came out clean so I took them out of the oven.
The next time I use this recipe I will try baking it at a lower temp, but could there be something else that I did wrong?
You mention that it didn't sink before...by chance have you recently moved to a different altitude?
That's often the problem with sinking middles........too much leavening and that recipe has a lot of leavening for 2 cups of flour.
Over the past year I've experienced the same thing with the carrot cake recipe I use (been using for 10 years). The cure for me was mixing it longer. I was under mixing it, like it was a muffin batter trying to avoid gluten building. Once I let it run longer in the mixer the problem corrected itself....