Mushrooms with Pickle Juice

 

  • unsalted butter
  • olice oil
  • 3 medium shallots, thinly sliced
  • 3 pounds mixed mushrooms, such as cremini, oyster, and stemmed shiitake, thickly sliced or quartered
  • 3/4 cup brine, strained from a jar of dill pickles
  • Kosher salt
  • Pepper