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Last updated: Aug 9, 2026
Illustration for reference only
A&W
Mushroom Onion Melt, Double
Hometown FavoritesPopular
Burger Patty, 4" High Top Plain Bun Toasted, Swiss Cheese Slice, Grilled Mushrooms, Grilled Onions, A&W Burger Seasoning
1 Order (237.9g)
Serving Size
237.9 g
Serving Weight
584
Calories
Per serving
37.8 g
Protein
39.2 g
Carbs
31.1 g
Fat
Nutrition Facts
Amount per serving
Calories584 kcal
% Daily Value*
Total Fat 31.1 g40%
Saturated Fat 12.5 g63%
Trans Fat 0.9 g—
Cholesterol 103 mg34%
Sodium 2,095 mg91%
Total Carbohydrate 39.2 g14%
Dietary Fiber 1.4 g5%
Total Sugars 6.1 g—
Protein 37.8 g76%
Vitamin A—
Vitamin C—
Vitamin D—
Calcium—
Iron—
Potassium—
Caffeine—
* The % Daily Value tells you how much a nutrient in a serving contributes to a daily diet.
Nutrition Breakdown
584
kcal
Protein37.8 g (26%)
Carbs39.2 g (27%)
Fat31.1 g (48%)
Estimated calorie contribution using 4 kcal/g for protein and carbohydrates and 9 kcal/g for fat.
Key Nutrients
Protein 37.8 g76%
Fiber 1.4 g5%
Sodium 2,095 mg91%
Sugars 6.1 g—
Saturated Fat 12.5 g63%
Ingredients
Burger Patty, 4" High Top Plain Bun Toasted, Swiss Cheese Slice, Grilled Mushrooms, Grilled Onions, A&W Burger Seasoning
Allergens
Contains
Milk
May contain
Not listed
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