Regional chain · Midwest & East Coast · Est. 1921
White Castle
America's oldest burger chain. Three fry recipes.
§ 01
At a glance
Vegetarian
Suitable
Plant-based ingredients across all three recipes.
Vegan
Suitable
No animal-derived ingredients in any of the three recipes.
Gluten-Free
Not suitable
Per White Castle: "Cooked in the same oil as items that may contain Wheat, Eggs, Milk, Soy, Fish, Shellfish."
Dairy-Free
Likely safe
No dairy in fries; shared fryer with chicken rings (milk), fish nibblers (milk), shrimp nibblers (milk).
Kosher
Not certified
Not kosher-certified.
Halal
Not certified
Not halal-certified.
White Castle is the oldest burger chain in America (founded 1921, predating McDonald's by 19 years) and the only chain on this atlas with three different French fry recipes. The version you receive depends entirely on which White Castle you visit. All three are vegan by ingredients; all three share a fryer with the wheat-breaded Chicken Rings, Fish Nibblers, Shrimp Nibblers, and Clam Strips that round out the side menu. White Castle is unusually transparent about this in their ingredient PDF.
§ 02
Nutrition facts
White Castle's published nutrition data for the serving size most comparable to an industry "medium" order. Values shown are per-serving and calculated against FDA 2020 Daily Values.
For comparison across chains, see our rankings pages — lowest sodium, lowest saturated fat, lowest calorie, and more.
§ 03
Ingredients, line by line
French Fries — Standard recipe (most U.S. locations)
- Potatoes Fine
- Vegetable oil Soy — Canola/corn/cottonseed/palm/soybean/sunflower.
- Dehydrated potato Fine
- Salt, disodium dihydrogen pyrophosphate, dextrose Fine
Standard: Potatoes, Vegetable Oil, Dehydrated Potato, Salt, Disodium Dihydrogen Pyrophosphate (to promote color retention), Dextrose. Cooked in the same oil as items that may contain Wheat, Eggs, Milk, Soy, Fish, Shellfish.
French Fries — Orlando & Scottsdale recipe
- Potatoes, vegetable oil, modified potato starch Fine
- Pea fiber, pea protein Fine — Plant-protein binders, not in the standard recipe.
- Rice flour Fine — Gluten-free coating texture, not in the standard recipe.
- Dextrin, dextrose, leavening, salt, SAPP, xanthan gum Fine
Orlando & Scottsdale only: Potatoes, Vegetable Oil, Potato Starch (Modified), Dextrin, Dextrose, Leavening, Pea Fiber, Pea Protein, Rice Flour, Salt, Sodium Acid Pyrophosphate, Xanthan Gum. Cooked in same shared oil.
Why three recipes?
White Castle's ingredient list explicitly identifies an Orlando-and-Scottsdale-specific French fry, and additional regional variation (different supplier formulations) at other locations. This is unusual — most fast-food chains standardize completely. The Orlando/Scottsdale recipe uses a more sophisticated coating system (rice flour + pea protein + xanthan gum) that produces a crispier, more textured fry; the standard recipe is closer to a traditional dehydrated-potato french fry. Both are vegan; both share the fryer.
America's first fast-food chain
White Castle pioneered the small square slider format in 1921 — 19 years before McDonald's first restaurant. They invented the now-universal idea of standardized fast-food production, made the first frozen burger, and were the first chain to sell more than 1 billion sliders. The fries are a relatively recent addition; for decades White Castle was just sliders. The ingredient transparency on their PDF is among the best in fast food — White Castle does this well.
§ 04
Oil & fryer setup
Primary oil
Vegetable oil blend
Soybean-based blend at most locations. Highly refined; FDA-exempt from soy allergen labeling.
Fryer setup
Shared
Per White Castle directly: "Cooked in the same oil as items that may contain Wheat, Eggs, Milk, Soy, Fish, Shellfish." Shared with Chicken Rings, Fish Nibblers, Shrimp Nibblers, Clam Strips, Onion Chips, Mozzarella Cheese Sticks.
Cross-contamination
Very high
White Castle's side menu is unusually fish-and-seafood-heavy for a burger chain. Wheat (chicken rings, mozz sticks), milk (multiple items), fish, shellfish (clam strips, shrimp nibblers) all share the fryer.
Recipe variation
3 recipes by region
Standard (most locations), Orlando & Scottsdale (rice-flour coating with pea protein), and additional supplier variation. The only chain on the atlas with documented multi-recipe variation.
§ 05
Top-9 allergen status
Per the FDA's nine major allergens, as disclosed by White Castle for White Castle French Fries.
✓ Milk*
✓ Wheat*
✓ Egg*
! Soy
✓ Peanut
✓ Tree Nut
! Fish*
! Shellfish*
✓ Sesame
Per White Castle: "Cooked in the same oil as items that may contain Wheat, Eggs, Milk, Soy, Fish, Shellfish." Unusually high seafood cross-contact for a burger chain.
§ 06
Frequently asked questions
Are White Castle's fries vegan?
Yes — White Castle's fries are vegan by ingredient. No animal-derived ingredients in any of the three recipes.
Are White Castle's fries gluten-free?
No — White Castle's fries are not safe for celiac disease. Per White Castle: "Cooked in the same oil as items that may contain Wheat, Eggs, Milk, Soy, Fish, Shellfish."
What oil are White Castle's fries cooked in?
White Castle's fries are cooked in Vegetable oil blend. Full oil and fryer details — including whether the fryer is shared with breaded items — are documented on this page.
Are White Castle's fries dairy-free?
White Castle's fries do not contain dairy as an ingredient. No dairy in fries; shared fryer with chicken rings (milk), fish nibblers (milk), shrimp nibblers (milk).
How many calories are in White Castle's fries?
A small french fries order of White Castle's fries contains 330 calories, 21g total fat (3.5g saturated fat), 550mg sodium, 32g carbs, and 3g protein. Source: White Castle official nutrition PDF.
§ 07
In the wild
Standard White Castle fries — uniform shoestring cut, lightly golden. The Orlando/Scottsdale variant has a slightly thicker coated appearance.
§ 08
Sources
Every claim on this page is sourced. If a source is wrong, dated, or missing, tell us — we update quickly.
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Important — read before you eat
Ingredient formulations change, sometimes with no public announcement. Allergen risk at any fast-food restaurant depends on the specific location, the time of day, and the staff on shift. For severe allergies, confirm ingredients with the restaurant at the point of ordering, and when in doubt, ask about fryer and equipment cross-contact. This page is an independent reference — not medical advice.
