A deliciously rich sauce perfect to put over steak, burgers, even potatoes!
Start with the butter. Heat a large skillet and melt the butter in it. Add the oil (I used grapeseed) and garlic. Cook on medium heat, stirring, for about 3 minutes.
Turn the heat to medium high and add the mushrooms. Cook them until they are starting to turn golden, about 10 minutes.
While it's cooking, stir the cream with the cornstarch until it's dissolved.
Stir the wine, salt and cornstarch mix into the mushrooms.
Add the rosemary and gently simmer on low until the sauce thickens, about 5 to 10 minutes. Remove the rosemary before serving.
Top a steak (or burger - or potato) with it. Garnish with chopped fresh chives. Easy and delicious.
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