Creamy Mushroom Sauce:

• 8 tablespoons butter, divided
• 16oz baby bella mushrooms, sliced
• 6 tablespoons shallots, minced
• 2 garlic cloves, smashed
• 1 1/2 cups beef broth
• 1 1/2 cups heavy cream or dairy free creamer*
• 1/4 cup sour cream (regular or dairy-free)
• 1/3 cup marsala wine
• 1 tablespoon black peppercorns
• 2–3 sprigs fresh thyme
• 1/2 teaspoon lemon zest, grated
• kosher salt and ground black pepper, to taste

Dry Rub:

• 4 teaspoons kosher salt
• 4 teaspoons coffee grounds
• 2 teaspoons garlic powder
• 1/2 teaspoon ground black pepper
• 1 teaspoon ground coriander
• 1 teaspoon onion powder
• 1/2 teaspoon chili powder
• 1/2 teaspoon ground cinnamon

Beef Tenderloin:

• 3–4 pound beef tenderloin, trimmed

Other Items:

• kitchen twine