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Last updated: Aug 9, 2026

A&W

Mushroom Onion Melt, Double

Hometown FavoritesPopular

A&W Mushroom Onion Melt, Double is fat-leaning, with about 48% of macro calories from fat. Each serving has 584 calories, 37.8g protein, 39.2g carbs, and 31.1g fat, making it a stronger fit for high-protein restaurant planning.

1 Order (237.9g)

Serving Size

237.9 g

Serving Weight

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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.

Meal Planning Insights

Protein density6.5/10

26% of macro calories come from protein.

Satiety index10/10

Estimated from protein, fiber, calories, and fat balance.

Activity estimate146 min walk

About 58 minutes of running for these calories.

Key Nutrients

Protein 37.8 g76%

Fiber 1.4 g5%

Sodium 2,095 mg91%

Sugars 6.1 g—

Saturated Fat 12.5 g63%

How we calculate these values

Diet Compatibility

High protein6.5/10 protein density from 37.8g protein and 584 calories.Yes

Lower carb39.2g carbs per serving.No

Low fat31.1g total fat per serving.No

High sugar6.1g total sugars per serving.No

High sodium2,095mg sodium per serving.Yes

Vegetarian source flagNo vegetarian flag is published for this item.Not flagged

Ingredients

Burger Patty, 4" High Top Plain Bun Toasted, Swiss Cheese Slice, Grilled Mushrooms, Grilled Onions, A&W Burger Seasoning

Allergens

Contains

Milk

Compare with other items

Select up to 3 items to compare calories, protein, sodium, and macros.

Quick comparisons

Mushroom Onion Melt, Double has 108 more calories than 3 Piece Pub Battered Cod and 15.3g more protein. Compare

Mushroom Onion Melt, Double has 213 fewer calories than A&W Root Beer Cream Freeze, Large and 23.5g more protein. Compare

3 Piece Pub Battered Cod476 kcal · 22.5 g proteinA&W Root Beer Cream Freeze, Large798 kcal · 14.3 g proteinA&W Root Beer Cream Freeze, Regular430 kcal · 7.2 g proteinA&W Root Beer Float, Large578 kcal · 7.7 g proteinA&W Root Beer Float, Regular320 kcal · 3.9 g proteinA&W Root Beer Zero Sugar, Kid's0 kcal · 0 g protein

Compare with 3 Piece Pub Battered Cod

Mushroom Onion Melt, Double Compared With Nearby Items

A&W Mushroom Onion Melt, Double is listed in the Hometown Favorites category with 584 calories, 37.8g protein, 39.2g carbs, and 31.1g fat per serving.

Data Source and Methodology

Nutrition values for Mushroom Onion Melt, Double are maintained in Nutrimetry from restaurant-published menu data and were last checked on Aug 9, 2026. Macro percentages use 4 calories per gram for protein and carbohydrates and 9 calories per gram for fat.

Read the data methodology

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