Eating at Culver’s with celiac disease, IBS or food allergies

Culver’s publishes an interactive Nutrition & Allergen Guide with an allergen chart and a full ingredient statement for each component, which makes it easier than most fast-food chains to see what’s in your order. But it also says plainly: "Due to the busy nature of our restaurants, cross-contact with allergens is possible. Please communicate any food allergies to a manager when ordering."

Its full disclaimer goes further. Culver’s says its restaurants "are often busy and cross contact may occur between ingredients and between different menu items, including allergens", and asks guests to tell their local restaurant manager about a food allergy and to ask to see the ingredient listings for the products they want, "as well as any product with which it may come in contact."

So this guide doesn’t point to "safe" choices. It summarizes what Culver’s own guide says, as checked in October 2026, about gluten, the major allergens and common FODMAP sources, and what to ask.

Culver’s chart has columns for gluten, milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, soy and sesame, plus a separate cross-contact symbol. The cross-contact symbol appears on fried items such as the fries, cheese curds, onion rings, chicken tenders and cod, and on the fries and cheese curds Culver’s describes it as a "risk of possible contamination due to cooking method."

Culver’s also says it works to provide up-to-date ingredient information, that it is important to consult a medical professional about food allergy concerns, and that its listings are updated periodically and may vary from printed materials.

On Culver’s online menu, the ButterBurger can be ordered on a Lightly Toasted Buttered Kaiser Bun, a Lightly Toasted Buttered Brioche Bun, a Gluten Free Hamburger Bun (Packaged Separately), or with No Bun. As of October 2026:

• The gluten-free bun is listed as Rotella’s Gluten Free Bun, with no allergens marked on the chart. Its ingredients include rice flour and rice starch, chickpea and faba bean protein.
• The buttered bun lists enriched wheat flour with malted barley flour, wheat gluten, butter and sesame seeds, and is marked for gluten, milk, wheat, soy and sesame.
• The beef patty is listed as 100% ground beef seasoned with salt and pepper, with no allergens marked.
• The fries list potatoes coated with starch and rice flour, "Cooked in Canola Oil," followed by: "(Cross-contact occurs with other allergens, including gluten, during cooking)."
• Gravy on the mashed potatoes contains wheat; the beef gravy is marked for gluten, wheat and soy.
• Cones (cake and waffle) are marked for gluten, wheat and soy, and the malted milk powder is marked for gluten, milk and wheat.

A bun packaged separately keeps that bun away from the build line, but the rest of the sandwich, the grill and the fryer are still shared. The Celiac Disease Foundation lists fried foods cooked in oil shared with breaded products as a cross-contact risk, and malt and malted barley flour as gluten sources. Whether a shared kitchen is an acceptable risk is a decision to make with your gastroenterologist or dietitian.

If you haven’t been diagnosed yet, NIDDK advises talking to your doctor about testing for celiac disease first, because avoiding gluten ahead of testing can make results inaccurate. See our guides to eating out with celiac disease and gluten-free vs celiac-safe.

These examples come from Culver’s Nutrition & Allergen Guide as checked in October 2026. They describe what Culver’s lists. They are not recommendations, and they can change.

Custard mix-ins carry their own allergens. Culver’s chart marks pecans and cashews for tree nuts, Reese’s peanut butter cups and sauce for peanuts, Heath toffee pieces for tree nuts, and cookie, brownie and cake pieces for wheat and gluten. Many Flavors of the Day combine several of these, so check the specific flavor each time.

Two smaller details. The Cocktail Sauce is marked for fish, and the Breaded Shrimp for shellfish. And the chart doesn’t always match itself: when we checked, the large Wisconsin Cheese Curds were marked for soy but the medium size was not. If something looks inconsistent, ask the manager to show you the current ingredient listing. Our guide to the major food allergens explains each one.

Based on Culver’s ingredient statements as of October 2026:

• Garlic and onion: grilled chicken seasoning, chicken tender coating, cheese curd batter, coleslaw, the beef and chicken gravies (onion powder), and sauces including Buttermilk Ranch, Honey Mustard, Culver’s Signature Sauce, Frank’s RedHot Buffalo (garlic powder) and Sweet Baby Ray’s BBQ (dried garlic).
• Wheat: in the regular buns, breaded and battered items, gravies and cones.
• Lactose: frozen custard, shakes, cheese, mashed potatoes (made with skim milk) and dairy-based sauces.
• Honey and high fructose corn syrup: honey in the Honey Mustard dressing; high fructose corn syrup in Sweet Baby Ray’s BBQ Sauce and possibly in the buttered bun, which lists "sugar or high fructose corn syrup."
• Legumes: the gluten-free bun includes chickpea and faba bean protein.

Monash University lists garlic, onion, wheat-based breads, honey, high fructose corn syrup, cow’s milk, apples and most legumes among higher-FODMAP foods, and potatoes and carrots among lower-FODMAP ones. That doesn’t decide any order for you: it depends on your triggers and how much you eat. A plain patty, a sauce on the side and a smaller custard are common places to start. Our guides to hidden garlic and onion and lactose intolerance have more.

1. Check the Nutrition & Allergen Guide for every part of your order: bun, protein, cheese, toppings, sauce and side. Use the Lifestyle Filter to hide items with your allergens, then open each category.
2. Ask for a manager, as Culver’s requests, and tell them about any allergy or celiac disease.
3. Ask to see the ingredient listings for your items and anything they may come in contact with, as Culver’s disclaimer suggests.
4. Ask about the grill and fryers if gluten or another allergen matters to you, including whether the fries share oil with breaded items.
5. If you’re unsure, skip it. It’s fine to eat something you’ve brought or choose somewhere else.

Helpful phrases: "I have celiac disease. Can I have the gluten-free bun still in its package, and can you tell me what the fries are cooked with?" and "I have a peanut allergy. Which custard flavors and toppings contain peanuts today?" Our guides to talking to restaurant staff about allergies and burgers and fast food with food restrictions have more.