I used creme fraiche instead of cream after which I reduced on a medium heat instead of boiling.
I didn't have fresh tarragon (only freeze dried) and didn't use the garlic clove because the sauce was for fish cakes.
I was thrilled that there wasn't even a hint of the strong creme fraiche taste.
Great recipe. - 25 Aug 2013
Very nice used it as a pasta and chicken sauce. Had to use tarragon paste instead of dried tarragon if you have to do this 1 tea spoon is enough. I personally prefer creme freche to double cream but i feel this is personal preference. - 06 Aug 2014