Step 1

Rinse and scrub mussels under cold water.

Step 2

Using your fingers or paring knife, remove beards (strings that hang from the mussel shells), and discard.

Step 3

Add butter, oil and anchovies to a large pot over medium heat. Cook until the anchovies break down, about 1 minute. Add garlic and red pepper flakes and let sizzle for about 30 seconds.

Step 4

Quickly pour in wine and broth into the pan and season with salt and black pepper, to taste.

Step 5

Bring sauce to a boil and cook 3 to 4 minutes, then stir in mussels, and cover immediately. Shake pot and let boil for 1 minute.

Step 6

Stir mussels, cover, and let boil for 3 to 4 minutes until the shells begin to open.

Step 7

Stir in parsley. Serve with grilled bread, if desired.