Five Guys

When I first attempted making this Five Guys Cajun Fries recipe using large, unpeeled russet potatoes I had just picked up at the grocery store, the fries came out of the oil looking miserably discolored and had an unpleasant soggy texture. They were dark brown and soft, rather than light brown and crispy like the amazing fries from Five Guys. I was sure to properly prep the fries by soaking them in water to wash away excess starch, then par-frying them at a low temperature, allowing them to cool, then frying them again at a higher temperature. But my initial results were a failure, and then I got distracted.

Over the next two weeks, I got busy with other recipes and neglected my unused potatoes. When I went back to the potatoes, I noticed they had become much softer and looked like they were about to sprout. Not wanting to let them go to waste, I cut the potatoes and fried them, and I was shocked to see how different they looked from my earlier batch. Rather than soggy and limp, these fries came out golden brown and crispy from tip to tip. Do old potatoes make better fries?

I remembered that Five Guys stacks bags of the potatoes used for the fries in the restaurant, and I wondered if I could see dates on those bags. I dashed back over to the restaurant and, sure enough, the potatoes were dated. The bags at one end of the stack were just one day old, and the bags closest to the kitchen were eight days old. I later discovered that Five Guys use specific Idaho potatoes because they are denser than other russets. I knew I couldn't get those special potatoes, but I discovered that I could still make crispy, more flavorful fries like Five Guys if I just let common russet potatoes sit out for a week or so before slicing and frying them.

Just as in the restaurant, the potatoes in this hack are fried twice, then you'll sprinkle them with the Cajun seasoning as soon as they came out of the oil. At Five Guys, they salt the fries first and then add Cajun seasoning, but I’ve included all the salt you’ll need in the secret seasoning mix below to eliminate that additional salting step.