Ingredients for - Chef John's Best Mushroom Gravy

1. Butter ¼ cup
2. Sliced mushrooms 1 (16 ounce) package
3. Salt to taste 1 (16 ounce) package
4. All-purpose flour, or as needed ¼ cup
5. Beef stock 1 quart
6. Ground black pepper to taste 1 pinch
7. Fresh thyme leaves, to taste 1 pinch

How to cook deliciously - Chef John's Best Mushroom Gravy

1 . Stage

Heat butter in a saucepan over medium heat until it foams. Stir in mushrooms and season with salt. Simmer until liquid evaporates, about 20 minutes.

2 . Stage

Stir in flour; cook and stir for 5 minutes. Add 1 cup of beef stock, stirring briskly until incorporated, then pour in the remaining stock and mix thoroughly. Season with black pepper and thyme. Reduce heat to medium-low and simmer until thickened, stirring often, about 30 minutes.