This steak sandwich is loaded with juicy steak slices, melted Gruyère cheese, candy caramelized onions, and the tastiest do-it-yourself spicy mayonnaise!

Every time I’ve beef within the fridge, likelihood is good I’ll flip it into steak quesadillas, a patty soften, or a very good old style steak sandwich. This time, I had skirt steak available, so I seared it, sliced it, and loaded it onto a baguette with melted cheese, caramelized onions, and do-it-yourself spicy mayonnaise. The crispy bread, juicy steak, and burst of flavors are SO good, and you may make it in 25 minutes or much less.
A Tacky Steak Sandwich So Good, You’ll Soften
- Textures and flavors. This sandwich actually has all of it, however we particularly love the onions and melty cheese. It makes the very best steak sandwich!
- Selfmade spicy mayo. I’ve seen loads of steak sandwich recipes with plain mayo or aioli, however I needed mine with a kick. So, I blended my mayo with sriracha, paprika, and lemon juice, and voila!
- Fast. Skirt steak sears shortly, so you possibly can have this juicy steak sandwich able to eat in beneath half-hour. It’s excellent for a lightweight dinner or lunch.
Sandwich Substances

- Onions – You’ll thinly slice them and caramelize the onions with butter, sugar, salt, and pepper. White or yellow onions work finest right here.
- Baguette – I like to make use of small, seeded baguettes or ciabatta rolls. You need to use any sturdy bread you’d like.
- Steak – I exploit skirt steak, however you need to use flank steak, sirloin, or ribeye steak. Keep on with quick-cooking cuts for the very best outcomes.
- Olive Oil – For searing. Cooking oil, like vegetable or avocado oil, additionally works.
- Gruyère Cheese – It is a gentle Swiss cheese with a nutty taste. Slice the cheese skinny or grate it because you’ll be melting it for the sandwich. Different good choices embody Swiss cheese, Provolone, Havarti, and cheddar.
- Blended Greens – Any greens you’d like. Attempt arugula, mesclun, and so on.
Selfmade Spicy Mayo
- Mayonnaise – You may make this sauce with solely Greek yogurt for a lighter choice, however I just like the richness of mayo.
- Greek Yogurt – Or plain yogurt. You may additionally substitute bitter cream or further mayo.
- Sriracha – Or your selection of scorching sauce or chili sauce. Candy chili sauce will make a milder dressing.
- Paprika – Candy or smoked.
- Lemon Juice – Freshly squeezed.

Recipe Ideas
- Lower towards the grain. This implies chopping throughout the fibers/traces operating via a chunk of steak, not alongside them. Reducing towards the grain retains the meat tender and juicy.
- Don’t overcook the steak. Skirt steak cooks shortly, so a brief 3 to 4 minute sear is all you want for an ideal medium-rare. Overcooking makes the steak robust.
- Toast either side. Toast the highest and backside halves of bread to get the entire sandwich good and crispy.
- Add the mayo afterward. Don’t add the mayonnaise to the bread earlier than toasting, or it’ll soften proper off!
- Don’t skip the sugar. Including sugar to the caramelized onions not solely sweetens them a bit, nevertheless it additionally helps them caramelize sooner.
- Make a wrap as a substitute. Fold the substances right into a burrito-sized tortilla wrap, egg white wrap, or cottage cheese flatbread.
What Else Can I Add to a Steak Sandwich?
Along with the spiced mayonnaise on this recipe, listed here are some tasty methods you possibly can customise this sandwich with add-ons. I’m keen on including a bit Macedonian purple pepper relish, myself. 🙃

Serve With Au Jus
A enjoyable technique to serve these steak sandwiches is sort of a French dip sandwich, with au jus. Au jus is a lightweight, savory gravy typically made out of pan drippings (see how you can make it in my prime rib recipe). Nevertheless, you should purchase au jus seasoning mixes from manufacturers like McCormick and Knorr. Pour the gravy into small bowls and dunk the sandwiches!
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For the Spiced Mayonnaise
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Caramelize the onions. Soften the butter in a skillet over medium-high warmth. Add the thinly sliced onions to the skillet and prepare dinner, stirring, till they begin to sweat. Then add sugar, salt, and pepper. Prepare dinner, stirring till the liquid has evaporated.
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Deglaze. Add 2 tablespoons of water to the onions and prepare dinner, scraping any browned bits from the underside of the skillet. Repeat this course of till the onions have that deep amber colour. This course of could take as much as half-hour. As soon as carried out, set the onions apart.
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Boost the mayo. Add the mayonnaise, yogurt, sriracha, smoked paprika, and lemon juice to a bowl. Stir to mix and put aside.
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Put together the steak. Pat the steak dry, then season it to style with salt and pepper. Warmth the olive oil in a forged iron skillet over medium-high warmth. Add the steak and sear it for 3-4 minutes per aspect, or till carried out to your choice, however do not overcook it. Take away the steak from the skillet and set it apart to relaxation for five minutes earlier than slicing. In the meantime, put together your bread.
To Assemble
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Prep. Preheat the oven to 450ºF. Lower the baguette in half by size to open it.
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Prime with cheese and onions. Place the baguettes, lower aspect up, onto the baking sheet. Prime the underside a part of the baguette with the caramelized onions and Gruyère cheese. Bake till the cheese melts.
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Add steak. Slice the steak thinly and place the slices over the melted cheese, then add the spiced mayonnaise and blended greens.
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End and serve. Shut the sandwich with the highest a part of the baguette, then lower it in half or into fourths. Serve.
- I don’t suggest that you just prepare dinner the skirt steak for too lengthy. This 3–4-minute sear is ideal. The meat will keep pink via the center.
- Toast the highest half of the baguette with the underside half since you need all of it to be crispy.
- Don’t unfold mayonnaise whereas toasting the bread. It would simply soften away.
- You need to use child arugula as a substitute of blended greens. Including sun-dried tomatoes to the sandwich could be a pleasant addition.
- We add sugar to the onions to steadiness taste but additionally velocity up the caramelization course of.
Serving: 0.25sandwich | Energy: 547kcal | Carbohydrates: 11g | Protein: 30g | Fats: 43g | Saturated Fats: 13g | Polyunsaturated Fats: 14g | Monounsaturated Fats: 14g | Trans Fats: 0.5g | Ldl cholesterol: 104mg | Sodium: 641mg | Potassium: 365mg | Fiber: 1g | Sugar: 2g | Vitamin A: 750IU | Vitamin C: 8mg | Calcium: 312mg | Iron: 2mg
Dietary data is an estimate and offered as courtesy. Values could fluctuate based on the substances and instruments used. Please use your most popular dietary calculator for extra detailed data.
How one can Make the Finest Steak Sandwich
The longest step is caramelizing the onions, however to attain true greatness, it’s value it! Comply with the steps under to organize the final word steak sandwich. This recipe makes two, however you possibly can at all times double or triple it for associates.


- Caramelize the onions. Add the thinly sliced onions to a skillet with melted butter. Stir because the onions begin to sweat. Subsequent, sprinkle within the sugar and season the onions with salt and pepper. Preserve cooking till the liquid evaporates.
- Delgaze. Now, deglaze the pan with 1-2 spoonfuls of water, scraping the underside. Repeat, including extra water because the onions deepen in colour. The method for caramelizing onions is low and gradual. Don’t rush it!
- Make the spicy mayo. Set the caramelized onions apart. In the meantime, mix the sauce substances and stir to mix.


- Prepare dinner the steak. Subsequent, pat the steak dry and season it with salt and pepper. Sear the steak in a scorching skillet with olive oil, about 3-4 minutes per aspect, till browned. Afterward, let the steak relaxation out of the pan for a couple of minutes.
- Soften the cheese. To organize the bread, slice the baguettes in half and prepare them on a baking sheet, lower side-up. To every backside half, add onions and sliced cheese. Place the buns right into a 450ºF oven till the cheese melts (maintain a detailed eye, it may well occur shortly!).


- Assemble. Slice the rested steak into skinny strips, towards the grain. Place the steak on high of the melted cheese, adopted by the ready mayonnaise, and at last a layer of greens. Shut the sandwich, slice it in half for simpler consuming, and dig in!

How one can Retailer and Reheat Leftovers
- Retailer the steak individually. When doable, retailer the steak sandwich elements earlier than assembling. Preserve the steak and leftover mayo in hermetic containers within the fridge. Get pleasure from leftovers inside 3-4 days.
- Reheat. Heat up the steak on the stovetop or within the microwave, taking care that it doesn’t overcook. Assemble the sandwiches as ordinary.
- Freeze. You’ll be able to freeze the cooked steak for as much as 2 months. Thaw it within the fridge earlier than serving.

