Mushroom Gravy
From:     https://www.daringgourmet.com/best-brown-mushroom-gravy-from-scratch/

 

Igredients
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2 Tbsp butter, bacon grease, lard or beef drippings
1 yellow onion, finely chopped
1 clove garlic ,minced
16Oz. fresh mushrooms of choice (I used button mushrooms in the photos) ,cleaned and sliced
1 Tbsp ground dried porcini mushrooms (if using dried porcini pieces grind them in a coffee/spice grinder or pound with a mallet in a ziplock bag)
4 Tbsp unsalted butter
4 Tbsp all-purpose flour
2 cups strong beef broth
1 tsp dark balsamic vinegar
1/2 tsp sea salt plus more to taste
1/2 tsp sugar
1/4 tsp dried thyme
1/4 tsp freshly ground black pepper
Optional: For a creamy gravy, add a few tablespoons of heavy cream at the end

Instructions Notes **If using this gravy for German Jägerschnitzel and you prefer a more basic, traditional gravy, omit the balsamic vinegar and thyme.