While I was away on holiday with the kids, my dh decided to cook a meal back home for himself and 3 colleagues and needed single cream as part of the recipe, but he went out and bought 3 tubs of sour cream , then he went back and bought 3 tubs of creme fraiche - on his 3rd trip he got the cream he wanted. Now we are back from holidays and I have a line up of sour cream and creme fraiche to use up which we don't usually use. Any ideas?