I should mention that I have made ricotta before, as a byproduct of making mozzarella (a slightly different process than the recipe I used here - I had made whey ricotta, which uses the leftover whey from another cheesemaking project. This recipe simply curdles milk with acid). It was delicious.
Sadly, though, this time was kind of a flop. I combined the required ingredients - milk, cream, citric acid, salt - in a pot and heated it to 185 degrees fahrenheit, at which point there should be discernible curds and yellowy whey. Sadly, though, while a few curds formed, I never got the curdling transformation I expected. I kept heating the mixture, hoping that maybe my thermometer just wasn't correct, but when I saw simmering bubbles I finally gave up. I strained the few curds through cheesecloth, and I got about a quarter of a cup of (admittedly, very delicious, very expensive) ricotta. So expensive that I don't even want to know about the cost comparison of homemade versus store bought.
Now, if you know me in person, you know that I'm a bit of a perfectionist. Therefore, I'll be trying this recipe again. However - I am terribly disappointed, having heard very positive things about Carlin's book. Oh well. On to better things, Cheesepalooza!