Jul 14 2026
Restaurants›Union Kitchen›Prime Flat Iron Steak Frites* Recipe

Prime Flat Iron Steak Frites* Recipe

Inspired by Union Kitchen
Time1h
Serves2

Make Prime Flat Iron Steak Frites* Recipe in just 1h . Get the full recipe with step-by-step instructions at pekinthechef.com.

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Ingredients

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Steak

Frites

Garlic Aioli (optional)

Method

Preparing the Steak

  1. 1

    Marinate the Steak

    In a bowl, combine olive oil, garlic powder, salt, black pepper, and chopped fresh rosemary. Rub this mixture all over the flat iron steak. Let it marinate for at least 30 minutes at room temperature.

  2. 2

    Cook the Steak

    Preheat the grill or a skillet over medium-high heat. Once hot, add the marinated steak. Cook for about 4-5 minutes on each side for medium-rare, or longer if desired. Remove from heat and let it rest for 5-10 minutes before slicing.

Preparing the Frites

  1. 3

    Cut the Potatoes

    Peel and cut the russet potatoes into thin strips, about 1/4 inch thick.

  2. 4

    Fry the Potatoes

    In a large pot, heat vegetable oil to 350°F (175°C). Carefully add the cut potatoes in batches and fry for about 5-7 minutes until golden brown and crispy. Use a slotted spoon to remove them and drain on paper towels. Sprinkle with salt while they are still hot.

Making the Garlic Aioli (optional)

  1. 5

    Prepare the Aioli

    In a small bowl, combine mayonnaise, minced garlic cloves, and lemon juice. Mix well. Add salt to taste. Serve as a dipping sauce alongside the steak frites.

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