I made a Cambodian curry, but it was too hot! They say dairy is good for cooling hot curries, but this one I made has coconut milk in it. Would it be ok to put cream in it? If so, single or double??
If it is about keeping authenticity, more coconut milk would be the answer. If you just want a toned down but well tasting curry, any emulsified fat - coconut milk, cream, yoghurt - will do, as long as you add it carefully in a way that doesn't make it split and become grainy (so whisk it, add it carefully with the heat turned off). Cream and/or yoghurt would be the authentic addition for a north indian curry.