I've used both the crockpot and oven method. If you use a crockpot you are going to want put your mixtured in a smaller heat resistant carrier because unless you plan on making a ton of it you'll end up with this too thin layer on the bottom of your crockpot that will end up burned. I got a crockpot that allowed me to set its temps I had it set at 250F preheated it before placing my mason jar inside. When I have used coconut oil I just heat it until it melts probably around 100 if I were to guess. I really did not notice any difference between the batch I made in the crockpot vs the oven for me its a matter of preference and I prefer the oven. With both the crockpot and oven I turned up the temp to 300 for ten minutes after I have "cooked" it for two hours. I then turn the oven off and leave it alone until it cools naturally another hour or two.