Flat Iron Steak with Basil Aioli

This flat iron steak with basil aioli is a delicious weeknight meal, ready in about 25 minutes. This recipe can serve two if you're only having the steak and sauce, but it will serve four if you serve it with a few sides or a nice, large salad. I've been experimenting with sauces lately and discovered that I love aioli - it's rich and creamy deliciousness - and it's easy to make! Please see my note below on consuming raw eggs, before you make this recipe. 

Flat Iron Steak with Basil Aioli Recipe

I got this flat iron steak at the farmer's market. I like buying my meat from the farmer's market or butcher where I know it will have been sustainably raised, grass fed, pasture raised, and organic. Here's a great source on understanding these terms. 

We don't eat red meat that often, it's more of a special occasion dish. So when we do get it, it's important to cook it the very best way possible - here's a great resource for cooking steak. 

Basil Aioli
flat iron steak

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You can make this recipe on an outdoor grill or on a grill pan on your stovetop. This is the grill pan I recommend. If you’d like a less expensive version, I think this one is quite good. For our outdoor grill, we have a Napoleon Rogue 425, we love it!

This recipe can by made with any kind of steak you'd like - I just found some wonderful flat iron steak. This would work with flat steaks like flank or skirt just as easily!

I hope you enjoy this easy dinner recipe! I think you'll find it incredibly satisfying! Please let me know if you make it, you can connect with me on Instagram or Facebook.

Please note - consuming raw eggs may increase the risk of food borne illnesses. Children, pregnant women, and the elderly should not consume raw eggs.

Yield: 2 servings

Flat Iron Steak with Basil Aioli

This flat iron steak with basil aioli recipe is a delicious weeknight meal, ready in about 25 minutes

prep time: 10 minscook time: 15 minstotal time: 25 mins


  • 1 lb. flat iron steak
  • 1 large egg yolk
  • 1 garlic clove, finely grated
  • 1/4 teaspoon salt
  • 1/4 cup grapeseed oil
  • 1/4 cup extra-virgin olive oil
  • 1 tablespoon freshly squeezed lemon juice
  • 1/2 teaspoon freshly ground black pepper
  • 1/4 cup finely chopped fresh basil leaves 


  1. Heat grill (or grill pan) to high heat. 
  2. Place steak on the grill and cook for 5 minutes. Flip the steak and cook for an additional 5 minutes or until steak is 155 degrees F on an instant-read thermometer.
  3. Meanwhile, whisk egg yolk, garlic, salt, and 2 teaspoons of water in a small bowl. 
  4. Continue to whisk the egg mixture and very slowly drizzle in the grapeseed oil, while continuing to whisk.
  5. Very slowly add the olive oil to the egg mixture, continue to whisk until the consistency is quite thick.
  6. Add the lemon juice, black pepper, and basil leaves and stir to combine. Set aside until meat is done cooking.
  7. Once the meat has cooked, let it rest for 5 minutes (preferably tented under aluminum foil), then slice into strips. Top with the aioli and serve. 



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