Prepare all the ingredients.
finely the shallots.
Melt the butter in a pan...
...and the shallots in it.
Add the scallops.
Then the mushrooms.
Stir.
Add the wine...
...thyme and tarragon.
Simmer with the lid on.
When the scallops are cooked, take them out and keep warm.
and with the double cream.
Let reduce again. Season.
Put the scallops back in the sauce.
Stir well...
...and cook for about ten minutes over low heat before serving.