Ina Garten's recipe for chocolate cake -- Beatty's Chocolate Cake -- driving me nuts. First time, cake batter bubbled out of the pans and all over the bottom of the oven. My fault, used milk w/ vinegar instead of buttermilk. But the second time still found that one of the pans ran over a bit, and then as they finished cooking they both went concave on me! I doublechecked the expiration date on my baking powder, and it's fine. Also, I found that the icing recipe barely made enough to cover the cake -- which wouldn't have been a problem but fort the concavity issue. Am assuming my troubles are of my own making/baking, but thought I'd check...BTW, the cake was delicious.