We had the same problem with the soup separating, but I think my fiancÃ© might have gotten it too hot before we put it in the crock pot. That did not stop our guests from eating just about the whole pot! Highly recommended as a good cheese soup for any time, not just Halloween.
I made this for a Halloween party I had this year. I doubled the recipe and used a block of colby jack cheese as well. After I got it all together, I transferred to a crockpot. Overall, didn't turn out too bad. The cheese separated out a little in the crock pot, but I think that's because I didn't cook it long enough on the stove first. Leftovers were yummy as well. Will definately make this again. Thanks for a simple, spicy cheese soup!