Smothered Flat Iron Steak in a Parmesan Pepper Sauce

Total Time
Prep 10 mins
Cook 10 mins

This is a super tasty steak dinner! Throw some medium or large shrimp in with the onion mixture for a surf and turf meal. Prep time does not include marinade time.

Ingredients Nutrition


  1. Pour 1/4 cup dressing over steak and seal in a Ziploc bag. Refrigerate at least 30 minutes or overnight to marinate.
  2. Combine sour cream, 2 tbsp of the remaining dressing, Parmesan cheese, salt and pepper. Refrigerate until serving time.
  3. Heat remaining 2 tbsp dressing and garlic in large nonstick skillet on medium heat. Add onions; cook until golden brown, stirring frequently. Remove onions; set aside.
  4. Drain steak; discard marinade. Cook steak in same skillet on medium heat 3-4 on each side for medium doneness. Place on cutting board; slice crosswise into thin strips. Serve steak topped with sauce and onions.


Most Helpful

Excellent flavor. We did alter the prep somewhat. We grilled our marinated steak on the charcoal grill. Also, after sauteing the onions, we stirred in the sour cream mixture to create a wonderful cream sauce to smother the slices of grilled steak. Served up with baked sweet potatoes and roasted asparagus, this was an incredible meal.

Ms B. October 14, 2008

LOVE this! It's super easy to make and tastes out of this world. So juicy and yummy! Initially, I made this with my fiancé in mind as he adores steak, but I tried it and loved it too, so this is definitely a great steak recipe!

anniesnomsblog September 01, 2016

This was marvelous. I did do the steak on the Big Green Egg at 450 deg. Also, did add the shrimp to the onion cook though this dish is rich and flavorful enough to stand entirely on its own. I will definitely cook this again.

docrjh June 29, 2015

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