I had the same issue with this recipe as well. I love the flavor of this cake and wanted to be able to use it..but it would fall on me just as your picture shows. I posted a question about it on here at one point. Anyway, I found that reducing the baking soda to 1 teaspoon and lowering the oven to 340 degrees has almost completely fixed the falling issue for me.

Much success,

Laura

Wonderful - thanks so much for the reply and help!  I will try this again tonight :)