This is a REALLY good chowder! I didn't have any cheddar so I used mozzarella and I added a pinch of red pepper flakes since I was out of cayenne pepper and it was just fine, a nice heat to a creamy and full tasting chowder.
In making the dish, it was a lot of stirring or the bottom of the pot will stick and that is never good, so you have to be very attentive. I love the way the flavors blend and it has a creamy taste due to the Yukon gold and onion base. I loved this chowder and will definitely make again (even with all the stirring).