I tried to make goat cheese following the recipe below, I did not use any buttermilk although a comment indicated that could be done. I kept the milk at the desired temperature for 10-15 minutes with no curdling occuring, took off the stove then added the reccomeneded amount of lemon juice and still no curdling occured.
http://guiltykitchen.com/2010/12/06/back-to-basics-culinary-fundamentals-goat-cheese/
My solution was to put the milk back on the heat until it started to curdle, and then take off the heat and add more lemon juice which produced curds, and then I was able to continue following the recipe. The result was a crumbly cheese that wasn't very spreadable. I used milk from a local farm, it did not have any indication of how pasturized it was.
What did I do wrong? Should I have left the milk on the heat at a stable temperature until is started to curdle?