REGIONAL CHAIN · SOUTHEAST · FOUNDED 1932
Krystal
The South's 1932 slider chain. Standard fries, shared fryer with chicken items.
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At a glance
Vegetarian
Suitable
No animal ingredients in fry recipe.
Vegan
Caution
Plant-based ingredients; shared fryer with fried chicken items (wheat-breaded).
Gluten-Free
Caution
Fries are gluten-free by ingredient but fried in shared oil. Krystal's allergen guide explicitly notes cross-contact risk on shared surfaces including fryers. Not suitable for celiac disease.
Dairy-Free
Suitable
No dairy in fries or oil. Per FDA, refined soybean oil is not considered a dairy allergen.
Kosher
Caution
No kosher certification.
Halal
Caution
No halal certification.
Krystal is the South's answer to White Castle — a 1932 Chattanooga-born chain serving square mini-burgers ("Krystals," not "sliders") since three years before White Castle opened its first Southern location. The fries are unremarkable by design: standard-cut frozen potatoes fried in refined soybean oil, salted after frying. Krystal's allergen information is prepared by MenuTrinfo® (a third-party certification service) and is explicit: shared fryers mean cross-contact is possible. For vegans and celiacs, the fryer story is typical — plant-based by ingredient, not celiac-safe in practice.
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Nutrition facts
Krystal'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.
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Ingredients, line by line
Annotated ingredient list
- Potatoes Fine — Standard-cut frozen fries. Offered in small, regular, and large sizes (140-300 cal).
- Refined soybean oil Fine — Per FDA, highly refined soybean oil is not considered a major food allergen. Krystal explicitly calls this out in their allergen disclosure.
- Salt Fine — Applied after frying.
VERBATIM KRYSTAL ALLERGEN STATEMENT ⓘ
"Please know that we practice caution and proper procedures when preparing allergen-free items, however, all allergens may be present in all of our kitchens. Be aware that there may still be a chance for cross-contact on shared surfaces, including fryers." — Krystal allergen guide, prepared by MenuTrinfo® (2023)
On Krystal vs. White Castle
Krystal (1932, Chattanooga) and White Castle (1921, Wichita) are America's two oldest mini-burger chains. Krystal remained a Southeastern concern while White Castle expanded across the Midwest and Northeast. The two chains have technically never competed in the same markets — White Castle stayed north of the Mason-Dixon line through most of its history, Krystal stayed south. Their fry programs differ: Krystal uses standard frozen-supply fries; White Castle offers Crinkle Cut Fries, Sliderz Fries (seasoned waffle cuts), and has more variety on their menu.
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Oil & fryer setup
Primary oil
Refined soybean oil
Highly refined soybean oil. Per FDA, this form is not considered a major food allergen and is not listed in Krystal's allergen chart.
Fryer setup
Shared
Shared with breaded chicken items (Chik Sandwich, Chicken Nibblers, Chik Biscuit) and other fried products. Krystal's allergen disclosure explicitly names shared fryers as a cross-contact risk.
Cross-contamination
Elevated for wheat
Shared fryer with wheat-breaded chicken products means continuous wheat cross-contact. Not suitable for celiac disease.
Format
Standard cut
Standard frozen straight-cut fries in three sizes (small 140 cal, medium ~200 cal, large 300 cal).
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Top-9 allergen status
Per the FDA's nine major allergens, as disclosed by Krystal for French Fries.
✓ Milk
! Wheat
✓ Egg
✓ Soy
✓ Peanut
✓ Tree Nut
✓ Fish
✓ Shellfish
✓ Sesame
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In the wild
Krystal's square mini-burgers with the signature standard-cut fries — the South's answer to the slider.
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Frequently asked questions
Are Krystal's fries vegan?
Krystal's fries are vegan by ingredient, but there is a cross-contact concern. Plant-based ingredients; shared fryer with fried chicken items (wheat-breaded).
Are Krystal's fries gluten-free?
Krystal's fries contain no gluten as an ingredient, but cross-contact with wheat-breaded items is possible. Fries are gluten-free by ingredient but fried in shared oil. Krystal's allergen guide explicitly notes cross-contact risk on shared surfaces including fryers. Not suitable for celiac disease.
What oil are Krystal's fries cooked in?
Krystal's fries are cooked in Refined soybean oil. Full oil and fryer details — including whether the fryer is shared with breaded items — are documented on this page.
Are Krystal's fries dairy-free?
Yes — Krystal's fries are dairy-free by ingredient and preparation. No dairy in fries or oil. Per FDA, refined soybean oil is not considered a dairy allergen.
How many calories are in Krystal's fries?
A regular french fries order of Krystal's fries contains 230 calories, 11g total fat (2g saturated fat), 380mg sodium, 29g carbs, and 3g protein. Source: Krystal Nutritional Guide PDF (MenuTrinfo-prepared).
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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.
