Kim, following the techniques of most of the brave souls who had gone before me, I did not sweat them first, just threw everything into the crockpot. My onions did get a nice brown colour, but it was still very liquidy (ok, so maybe that's not a real word) 15 hours later. That why I wonder, if, without sweating, I should just reduce the amount of butter and oil since onions produce so much water of their own. Curly's suggestion of starting them out in the frying pan makes some sense to me, but then wouldn't you just have fried onions, only cooked longer? I honestly don't know.