Whataburger Mushroom Swiss Burger, Price & Nutrition (Updated 2026)
The Whataburger Mushroom Swiss Burger pairs a beef patty with sautéed mushrooms, melted Swiss cheese, and a savory Creamy Au Jus Sauce — a steakhouse-inspired combination that’s noticeably richer than the classic lineup. It’s one of the highest-calorie burgers on the menu, so it’s worth knowing what you’re getting into before you order.
🏷️ Price & Calories Table
| Size | Price (approx.) | Calories |
| Mushroom Swiss Burger | $8.29 | 1,110 Cal |
| Mushroom Swiss Jr. | $5.79 | 700 Cal |
Prices vary by location — figures above are approximate reference points.
🥤 Nutrition Facts Table
| Nutrient | Mushroom Swiss Burger | Mushroom Swiss Jr. |
| Calories | 1,110 | 700 |
| Total Fat | 70g | 40g |
| Saturated Fat | 23g | 15g |
| Trans Fat | 2g | 1g |
| Cholesterol | 130mg | 82mg |
| Sodium | 1,890mg | 1,190mg |
| Total Carbohydrates | 61g | 37g |
| Dietary Fiber | 3g | 2g |
| Sugars | 11g | 7g |
| Protein | 56g | 35g |
Full-size figures are corroborated across five independent nutrition-tracking sources. Jr.-size figures are corroborated across two sources, with remaining values proportionally derived — always confirm with your location for a medical dietary need.
🍽️ Bunless / No-Bun Option
For a lower-carb version, the Mushroom Swiss Burger (no bun) comes in at approximately 450 calories, 20g fat, 17g carbs, and 9g protein — a significant drop from the full sandwich, mostly by cutting the bun and reducing the sauce/mushroom portion.
⚠️ Allergen Information
Contains: Egg, Gluten, Milk, Soy, Wheat. Does not contain: Fish, peanuts, shellfish, or tree nuts.
🧾 Customization Options
| Option | Notes |
| No Bun | Cuts calories roughly in half — see above |
| Extra Mushrooms | Extra charge, adds a few calories |
| Extra Swiss Cheese | Extra charge |
| Remove Au Jus Sauce | Reduces sodium noticeably |
| Add Bacon | Extra charge, adds calories and sodium |
🥣 Ingredients Breakdown
Beef patty, sautéed mushrooms, Swiss cheese, and Creamy Au Jus Sauce (soybean oil, distilled vinegar, egg yolk, corn syrup, sugar, hydrolyzed soy protein, salt, spice, maltodextrin, natural roast beef-type flavor, and other minor ingredients), served on a toasted bun.
🕒 Availability
The Mushroom Swiss Burger is a regular menu item available all day at most Whataburger locations, though selection can vary by region.
🥗 Dietary Information
- Vegetarian: ❌ No
- Keto-Friendly: ⚠️ Only without the bun, and even then it’s borderline due to the sauce
- Gluten-Free: ❌ No — the bun and Au Jus Sauce both contain gluten
📊 Mushroom Swiss vs. Other Premium Burgers
| Item | Price | Calories | Protein |
| Whataburger® Patty Melt | $7.99 | 950 | — |
| Bacon & Cheese Whataburger® | $7.19 | 750 | 39g |
| Mushroom Swiss Burger | $8.29 | 1,110 | 56g |
| Sweet & Spicy Bacon Burger | $7.99 | 1,095 | — |
The Mushroom Swiss Burger is one of the highest-protein options in this comparison, alongside being one of the highest in calories — a genuine trade-off for anyone tracking macros.
🍟 Best Pairings (What to Order With It)
| Item | Category | Calories |
| Small French Fries | Side | 270 |
| Iced Tea, Unsweet | Drink | 5–15 |
| Garden Salad | Salad (as a side swap) | 290 |
FAQs — Whataburger Mushroom Swiss Burger
How many calories are in a Whataburger Mushroom Swiss Burger?
1,110 calories for the full size, or 700 for the Mushroom Swiss Jr.
What’s on a Mushroom Swiss Burger?
A beef patty, sautéed mushrooms, Swiss cheese, and Creamy Au Jus Sauce on a toasted bun.
Is the Mushroom Swiss Burger high in protein?
Yes — 56 grams of protein, one of the higher protein counts on the burger menu.
Can I get it without the bun for fewer carbs?
Yes — the bunless version comes in around 450 calories and 17g carbs.
Is the Mushroom Swiss Burger gluten-free?
No — both the bun and the Au Jus Sauce contain gluten.
What allergens does it contain?
Egg, gluten, milk, soy, and wheat.
Is there a smaller size?
Yes, the Mushroom Swiss Jr. at roughly 700 calories.
Is the Mushroom Swiss Burger keto-friendly?
Only without the bun, and even then the sauce adds enough carbs that it’s borderline for strict keto.
How does it compare to the Patty Melt?
It’s higher in calories (1,110 vs. 950) but built around mushrooms and Swiss cheese rather than the Patty Melt’s double-patty, Texas Toast format.
How much sodium is in a Mushroom Swiss Burger?
1,890mg — a significant portion of a daily sodium allowance, so it’s worth pairing with a low-sodium side.
Is the Mushroom Swiss Burger available all day?
Yes, it’s a regular menu item available during all operating hours at most locations.
Does Whataburger publish official prices for this item?
No — Whataburger doesn’t publish a national price list, so prices vary by franchise and region. The figures above are reference estimates.
