Five Guys Cajun Fries Recipe (Copycat Crispy)

The first time I ordered Cajun fries at Five Guys, I ate them in the car before I even started driving. That is the effect they have on me. There is something about the combination of peanut oil and that specific Cajun seasoning blend that creates an aroma so good it is genuinely hard to wait. When Five Guys opened a location near my house I was thrilled, but the novelty of paying $6 for a small order wore off quickly, and I started testing my own version at home. The breakthrough came when I committed to two things I had been cutting corners on: double-frying in actual peanut oil, and tossing the seasoning on the fries while they are still screaming hot so it adheres and blooms into the oil still coating them. Get those two things right and the result is remarkable.

The double-fry method is the real secret to the texture. The first low-temperature fry cooks the potato through completely; the second high-temperature fry drives out remaining moisture and creates the shatteringly crispy exterior Five Guys is known for. Skin-on russet potatoes are essential – Five Guys famously uses fresh potatoes with the skin left on, and that bit of skin creates flavor and texture contrast that peeled fries simply cannot match.

Why You’ll Love This Recipe

• The double-fry technique produces fries that are genuinely crispy on the outside and fluffy on the inside – no compromise between the two
• Homemade Cajun seasoning lets you control the heat level, making it family-friendly or as spicy as you want
• Peanut oil gives the fries a clean, slightly nutty flavor that is distinctively different from generic vegetable oil and much closer to the Five Guys original
• Skin-on russet potatoes mean no peeling required, which saves time and adds rustic character to the final fry
• A large batch of fries costs less than one order at the restaurant and feeds four people generously

About This Multi-Brand Favorite

Five Guys Burgers and Fries started in 1986 in Arlington, Virginia, when Jerry Murrell and his sons opened their first location with a simple philosophy: never freeze the meat, never freeze the potatoes, and make everything fresh. The chain grew slowly through the 1980s and 1990s before an explosive expansion in the 2000s that took it from regional favorite to national chain. Their fries became as famous as their burgers, known for being hand-cut daily from fresh potatoes displayed in large open bags at every location. Five Guys offers two fry options: regular style and Cajun style. The Cajun variety – identically prepared fries tossed in a proprietary Cajun seasoning blend – became enormously popular as an alternative that delivered more flavor intensity than the plain version. The Cajun cooking tradition that inspires the seasoning originates from the French-Acadian settlers of Louisiana, who developed a bold, aromatic spice palette built on paprika, pepper, onion, garlic, thyme, and oregano – flavors that translate powerfully onto the surface of a hot, oil-coated fried potato.

Ingredients

The Fries

• 3 lbs russet potatoes (about 4-5 large), skin-on
• Peanut oil for deep frying (enough to fill pot 4 inches deep)

Homemade Cajun Seasoning

• 2 tbsp paprika
• 1 tbsp garlic powder
• 1 tbsp onion powder
• 1 tbsp salt
• 1 tsp black pepper
• 1 tsp dried thyme
• 1 tsp dried oregano
• 1 tsp cayenne pepper (reduce to 1/2 tsp for mild)
• 1/2 tsp white pepper

For Serving

• Five Guys-style paper cups or cones for serving
• Malt vinegar for dipping
• Extra Cajun seasoning for the table
• Ketchup

Ingredient Substitutions

• Peanut oil can be replaced with canola or vegetable oil if there are peanut allergies – the flavor will be slightly less distinctive but still excellent
• Russet potatoes can be swapped for Yukon Gold for a slightly creamier, buttery interior, though the skin is thinner and more delicate
• Store-bought Cajun seasoning (Tony Chachere’s or Zatarain’s) can substitute for the homemade blend if you are short on time – use about 2 to 3 tablespoons
• For an air fryer adaptation, use just 2 tablespoons of peanut oil, toss the raw cut fries in oil and a small amount of the seasoning, and air fry at 400F for 20 to 25 minutes, shaking every 7 minutes
• Reduce or omit the cayenne pepper entirely for a kid-friendly version that still has all the other Cajun flavors without any heat

Equipment You’ll Need

• Large heavy pot or Dutch oven for deep frying
• Deep-fry thermometer for monitoring oil temperature
• Spider skimmer or slotted spoon for removing fries from oil
• Wire rack set over a rimmed baking sheet for draining
• Large mixing bowl for tossing fries in seasoning
• Sharp chef’s knife and sturdy cutting board

Step-by-Step Instructions

1. Wash and Cut the Potatoes. Scrub the russet potatoes thoroughly under cold running water – you are leaving the skin on, so get them clean. Cut each potato into planks about 1/3 to 1/2 inch thick, then cut the planks into fry-shaped sticks of similar thickness. Five Guys cuts theirs into a rustic medium-thickness style, not shoestring thin and not thick-cut steak fries. Try to keep your cuts reasonably consistent so they fry evenly. The skin stays on every piece.
2. Soak in Cold Water. Place all the cut fries into a large bowl, cover completely with cold water, and let them soak for 30 minutes. This step draws out excess surface starch, which is one of the main causes of fries sticking together in the fryer and developing a gummy exterior instead of a crispy one. After soaking, drain the fries in a colander and spread them on a clean kitchen towel. Pat them as dry as you possibly can – water and hot oil are a dangerous combination, and wet fries also steam instead of fry, which undermines the crispiness.
3. First Fry at 325F. Pour peanut oil into your heavy pot to a depth of about 4 inches. Heat over medium heat until the oil reaches 325F – use a thermometer, not guesswork. Working in batches of about 1 pound of fries at a time, carefully lower the dried potatoes into the oil. Fry for 5 to 6 minutes, stirring once or twice, until they are cooked through but still pale and have no color yet. They should feel tender when you poke one. Remove with a spider or slotted spoon and spread on the wire rack. The first fry is entirely about cooking the interior – no browning needed here.
4. Rest the Fries. Let the par-fried fries rest on the wire rack at room temperature for at least 10 minutes. This is not just a waiting period – the resting time allows moisture to escape from the surface of the fries as steam, which means the second fry starts on a drier surface and produces dramatically more crunch. You can rest them for up to 30 minutes if you are working in batches and timing your meal. If you want to prep ahead, you can refrigerate the par-fried fries for up to 24 hours at this stage.
5. Second Fry at 375F. Increase the oil temperature to 375F. Again working in batches (do not crowd the pot), lower the rested fries back into the hot oil and fry for 3 to 5 minutes, watching carefully, until they are deeply golden brown and visibly crispy. The color should be a rich amber-gold. Remove them to the wire rack, but do not let them sit – you want to season them within 30 seconds while the surface is still coated in hot oil.
6. Season and Serve. Transfer the hot fried fries immediately from the wire rack to a large mixing bowl. Sprinkle the Cajun seasoning generously over them – I use about 1.5 to 2 tablespoons for a full batch, but go as heavy or light as you like. Toss quickly and vigorously with tongs or your hands so every fry gets coated. The Cajun seasoning blooms into the hot oil still coating the fries and sticks far better than it would on cooled fries. Serve immediately in cups or on plates. These wait for no one.

Pro Tips from My Kitchen

• Dry the fries as thoroughly as you can after soaking – every drop of surface water causes oil to splatter when it hits 375F and also creates steam that prevents crisping
• Season the fries immediately after the second fry while the oil on their surface is still hot – the Cajun seasoning adheres and blooms in the hot fat, and if you wait even 2 minutes the effect is noticeably diminished
• Maintain your oil temperatures carefully using a thermometer – the first fry at 325F cooks the interior gently, and the second at 375F creates the crust; skipping the two-temperature approach makes a real difference in final texture
• Do not crowd the pot at either stage of frying – adding too many fries at once drops the oil temperature sharply, which extends frying time and results in greasier, less crispy fries
• Peanut oil specifically gives the fries that slightly nutty, clean flavor that is distinctively Five Guys – it is worth using if you can, especially since it has one of the highest smoke points of any common frying oil
• Rest the par-fried fries properly – that 10-minute rest after the first fry allows steam to escape and creates a much drier surface for the second fry to work on

Recipe Variations

• Extra spicy Cajun fries: double the cayenne to 2 teaspoons and add 1/4 teaspoon of ghost pepper powder for a genuinely fiery version that still has the full Cajun flavor base
• Cheese Cajun fries: immediately after the final toss with Cajun seasoning, top with freshly shredded American or cheddar cheese and a drizzle of queso for a loaded version
• Cajun sweet potato fries: use sweet potatoes instead of russets for a sweeter, slightly softer fry that pairs beautifully with the savory heat of the Cajun seasoning
• Baked Cajun fries: toss raw cut and dried fries with 3 tablespoons of peanut oil, spread in a single layer on two sheet pans, and roast at 425F for 25 to 30 minutes flipping halfway – not identical but quite good
• Cajun fry seasoning blend on other things: use the Cajun spice mix on popcorn, roasted chickpeas, seasoned nuts, or as a dry rub on chicken wings before baking

Common Mistakes to Avoid

• Skipping the cold water soak – surface starch is what makes fries stick together and develop a dense, gummy texture; the 30-minute soak makes a measurable difference in crispiness
• Not drying the fries before frying – wet fries added to hot oil cause violent splattering and steam rather than fry, resulting in pale, soft, greasy fries that never really crisp up
• Only frying once – the double-fry is not optional if you want the right texture; a single fry at any temperature gives you fries that are either cooked through but limp or crispy outside with an undercooked center
• Seasoning the fries after they have cooled – Cajun seasoning applied to cold fries sits on the surface and falls off with every bite; applying it to hot, oil-coated fries makes it stick and bloom into the fat
• Using a peanut allergy substitute without adjusting – some people swap to sesame oil thinking it is similar, but sesame oil has a strong distinctive flavor that clashes badly with Cajun seasoning; use canola or vegetable oil instead

What to Serve With This Dish

• Classic smash burgers or a homemade Five Guys-style bacon cheeseburger for the full fast-casual experience at home
• Malt vinegar on the side for dipping – this is a classic Five Guys accompaniment and the acid cuts beautifully through the rich, seasoned fries
• Homemade In-N-Out style spread as a dipping sauce – the sweet, creamy sauce is an incredible contrast to the bold spiced fries
• Grilled hot dogs in toasted buns for a casual cookout pairing where the Cajun fries become the star of the spread
• A cool, creamy coleslaw to serve alongside – the creaminess and mild sweetness of coleslaw is the perfect counterpoint to spicy, crunchy Cajun fries

Storage Instructions

Refrigerator

Fully cooked Cajun fries do not store or reheat well – fried potatoes lose their crispiness very quickly and become limp within 30 minutes. If you must save some, store in an airtight container in the refrigerator for up to 2 days, but expect significantly softer texture.

Freezer

Par-fried fries (after the first fry only) can be frozen in a single layer on a baking sheet and then transferred to a freezer bag. Keep frozen for up to 3 months. Thaw briefly and complete the second fry from slightly frozen – they come out excellent.

How to Reheat

The air fryer is the best method for reheating leftover fries – 375F for 3 to 5 minutes restores a surprising amount of crispiness. The oven (425F on a wire rack for 5 to 8 minutes) is the second-best option. Microwave reheating produces limp, sad fries and is not recommended.

Make Ahead

The most useful make-ahead step is completing the first fry and refrigerating the par-cooked fries for up to 24 hours. This means at meal time you only need to do the second high-temperature fry, which takes just 3 to 5 minutes. The Cajun seasoning mix can also be made weeks in advance and stored in a sealed jar.

Nutrition Information

Per serving (estimated): 420 calories, 5g protein, 58g carbs, 19g fat (3g saturated), 5g fiber, 2g sugar, 680mg sodium.

Nutrition values are estimates and will vary based on exact ingredients used.

Frequently Asked Questions

What makes Five Guys fries different from other fast food fries?

Several things set Five Guys fries apart: they use fresh, never-frozen potatoes cut daily in each location; they fry in peanut oil rather than vegetable shortening or blend oils; they leave the skin on; and they are cooked in an open style with the potato sacks displayed proudly. The Cajun version adds a proprietary spice blend applied immediately after frying. The overall result is a fry with more flavor, more texture variation, and more character than standard fast food fries.

Why does Five Guys use peanut oil?

Peanut oil has a high smoke point (around 450F), a clean neutral flavor with a very faint nutty quality that complements potato beautifully, and it produces a notably crispy exterior. Five Guys is also transparent about using it – their locations post allergy warnings prominently since peanut allergies are serious. If you have a peanut allergy, canola or vegetable oil are the safest substitutes.

Do I really need to double-fry? Can I just fry once at a higher temperature?

You can, but you will not get the same result. A single high-temperature fry (375F+) browns and crisps the exterior before the interior is fully cooked. A single low-temperature fry (325F) cooks the interior but leaves the outside pale and soft. The two-stage method is the only way to get fully cooked, fluffy interior with a genuinely crispy exterior simultaneously.

How do I keep the fries crispy while I cook multiple batches?

Place finished batches on a wire rack set over a baking sheet in a 200F oven – this keeps them warm and lets air circulate underneath so they do not steam and go soft. Do not stack them or cover them with foil while they wait. Season each batch right as it comes out of the oil, not when you are about to serve everything.

Can I use an air fryer for this recipe?

Yes, with some adaptation. Toss the soaked, thoroughly dried raw fries with 2 tablespoons of peanut oil and a portion of the Cajun seasoning. Air fry at 400F for 20 to 25 minutes, shaking the basket every 7 minutes. The result will not be quite as crispy as deep-fried, but it is genuinely good and requires much less oil. The Cajun flavor comes through well.

What kind of potatoes should I use?

Russet potatoes are the correct choice here – they are high in starch and low in moisture, which produces the fluffy interior and crispy exterior you want from a fry. Five Guys specifically uses russets. Avoid waxy potatoes like red potatoes or fingerlings, which hold too much moisture and produce fries that are dense and soggy rather than light and crispy.

How spicy are Five Guys Cajun Fries?

The restaurant version has a noticeable but moderate heat – you feel it, but it is not uncomfortable for most people. In this copycat recipe with 1 teaspoon of cayenne, the heat level is similar. Reduce to 1/2 teaspoon for milder, or increase to 1.5 to 2 teaspoons if you want genuine heat. The cayenne is the main adjustable variable for spice level.

What is in Five Guys Cajun seasoning?

Five Guys has not disclosed their exact proprietary blend, but the flavor profile is consistent with classic Louisiana Cajun seasoning: paprika as the base, garlic powder, onion powder, black and white pepper, thyme, oregano, cayenne, and salt. This copycat blend reproduces that flavor very closely.

How long should I soak the potatoes?

A minimum of 30 minutes in cold water is needed to draw out enough surface starch to make a noticeable difference. An hour is better. Some recipes call for overnight soaking in the refrigerator for maximum effect. Beyond the starch removal, soaking also prevents cut potatoes from oxidizing and turning brown while you prepare other things.

Why are my fries turning out greasy instead of crispy?

Several culprits: the fries were not dried thoroughly before frying (water causes the oil temperature to drop and steam the fries instead of fry them); the oil temperature was too low, especially during the second fry; or the pot was overcrowded which dropped the oil temperature. Check all three of these before your next batch.

Can I make the Cajun seasoning ahead of time?

Yes, and I strongly recommend it. The homemade Cajun blend keeps in a sealed jar in a cool, dark pantry for up to 6 months. Making a large batch (quadruple or more the recipe) means you always have it ready for fries, grilled chicken, shrimp, popcorn, or any time you want bold Cajun flavor without reaching for multiple jars.

How do Five Guys know which potatoes they are using on a given day?

Five Guys displays the potato bags openly in each restaurant with a sign identifying the farm and region the current potatoes came from. The variety and growing location affects the moisture and starch content of the potato, which is why the fries can taste slightly different from visit to visit. It is part of the brand’s fresh, transparent approach to sourcing.

More Multi-Brand Copycat Recipes

• All Copycat Restaurant Recipes

Happy cooking,
Julia