TIP: It’s Ok if not all of the peppercorns stick; you can add them to the pan sauce in the next step. TIP: Add a pinch of peppercorns now in the event that they didn’t stick in step 3.) Simmer, flipping mushrooms often, until sauce has thickened and mushrooms are coated, 1-2 minutes more. Step 2 - In a small saucepan, heat the cream till it almost reaches a ...