How to Make Crispy French Fries
Master the double-fry technique with a starch rinse and cornstarch coating to create ultra-crispy, golden French fries with a fluffy interior at home.
This guide shows how to make crispy french fries in 1 hour 15 minutes. Start with peel and uniformly slice potatoes; follow the safety notes and step checkpoints below.
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🧰 Required Tools & Equipment
- ✓ Chef's knife
- ✓ Large heavy-bottomed Dutch oven
- ✓ Deep-fry thermometer
- ✓ Spider skimmer strainer
- ✓ Wire cooling rack with baking sheet
- ✓ Large mixing bowls
- ✓ Paper towels
📦 Materials & Supplies
- ✓ 4 large Russet potatoes
- ✓ 2 quarts peanut or canola oil
- ✓ 2 tablespoons white vinegar
- ✓ 2 tablespoons cornstarch
- ✓ Fine sea salt to taste
⚠️ Safety Checkpoints & Warnings
- • Never fill the pot more than halfway with oil to prevent boil-overs when moisture expands.
- • Ensure potatoes are thoroughly dry before frying to prevent violent hot oil spatters.
- • Keep a properly rated kitchen fire extinguisher or pot lid nearby; never use water on a grease fire.
📋 Step-by-Step Guide (6 Steps)
Peel and Uniformly Slice Potatoes
Peel all russet potatoes and square off the rounded edges using a sharp chef's knife. Slice each potato lengthwise into uniform 3/8-inch planks, then cut each plank into 3/8-inch square batons. Uniform thickness is essential so that every fry cooks and crisps at the exact same rate.
- • Evenly cut 3/8-inch potato batons with no jagged edges
- • Slices match uniformly in thickness
- • Cutting uneven sizes, causing thin pieces to burn before thick ones cook.
Soak and Agitate in Cold Water
Submerge the cut potato batons into a large bowl filled with cold tap water. Vigorously agitate the fries with your hands for 60 seconds to dislodge excess surface starch, then drain and repeat with fresh cold water. Let the fries soak for at least 20 minutes to prevent the fries from sticking together and burning.
- • Water turns cloudy from released starch during agitation
- • Final rinse water runs completely clear
- • Skipping the soak, leaving surface starches that scorch quickly in the oil.
Parboil with Acidulated Salt Water
Bring 3 quarts of water to a boil in a pot along with 2 tablespoons of white vinegar and 1 tablespoon of salt. Add the rinsed potatoes and boil gently for 8 to 10 minutes until they are par-cooked and easily pierced with a fork but not crumbling. The vinegar slows pectin breakdown, preserving structural integrity during deep frying.
- • Potatoes appear slightly translucent along the edges
- • A toothpick slides through the center with slight resistance without breaking the baton
- • Boiling at a violent rolling boil, which breaks the delicate potato batons.
Dehydrate and Lightly Dust with Starch
Transfer the boiled potatoes onto a wire cooling rack set over a baking sheet and allow them to steam dry for 10 minutes. Blot any lingering surface moisture with paper towels, then transfer to a dry bowl and toss gently with 2 tablespoons of cornstarch until a thin, invisible powdery film forms. This micro-layer absorbs residual surface moisture and forms a glass-like crisp shell.
- • Potato surfaces look matte, chalky, and completely dry to the touch
- • Even, translucent dusting of cornstarch across all surfaces without clumps
- • Dusting while potatoes are wet, creating gummy paste clumps rather than a fine crisping layer.
Execute Initial Low-Temperature Par-Fry
Heat 2 quarts of neutral oil in your Dutch oven to 325°F (165°C), monitoring continuously with a deep-fry thermometer. Working in batches, lower half the fries into the hot oil using the spider strainer and fry for 5 minutes without browning. Remove the pale fries and rest them on the wire rack for at least 15 minutes to cool and release inner steam.
- • Fries turn firm, chalky, and pale with zero browning
- • Fries float easily to the oil's surface
- • Overcrowding the pot, which drops oil temperature and leads to greasy, limp fries.
Flash Fry at High Heat and Season
Raise the oil temperature to 375°F (190°C). Lower the rested fries into the hot oil in batches and fry for 3 to 4 minutes until deeply golden brown and audibly crisp. Transfer immediately to a metal bowl lined with paper towels, dust generously with fine sea salt, and toss while still piping hot so the seasoning sticks.
- • Deep golden-yellow color with a rigid, blistered exterior
- • Fries make a dry, crisp rustling sound when shaken in the bowl
- • Waiting too long to salt, preventing the seasoning from adhering to the cooled surface oil.
Credit: inspired by an original tutorial by Cooking Kun — watch the original on YouTube.
Don’t have everything?
- No Spider strainer? Metal slotted spoon
- No Deep-fry thermometer? Wooden skewer inserted into oil (bubbles rapidly at frying temp)
- No Cornstarch? Potato starch or rice flour
- No White vinegar? Apple cider vinegar or lemon juice