The middle still sank a little, but it was more like a mild divot this time instead of a huge crater. And the inner portion was completely cooked and edible. Still not ideal, but perfectly passable. A cross section:
I'm just gratified that I got the recipe to turn out... Phew!
Recipe: Gingerbread from King Arthur Flour.
Previous Post: "Gingerbread, Guaranteed?," October 26, 2008.