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Last updated: Aug 9, 2026

A&W

Mushroom Onion Melt, Single

Hometown FavoritesPopular

A&W Mushroom Onion Melt, Single is fat-leaning, with about 40% of macro calories from fat. Each serving has 400 calories, 22.2g protein, 38.5g carbs, and 18.2g fat, making it a moderate option for comparing calories and macros.

1 Order (170.3g)

Serving Size

170.3 g

Serving Weight

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400

Calories

Per serving

22.2 g

Protein

38.5 g

Carbs

18.2 g

Fat

Nutrition Facts

Amount per serving

Calories400 kcal

% Daily Value*

Total Fat 18.2 g23%

Saturated Fat 6.4 g32%

Trans Fat 0.4 g—

Cholesterol 52 mg17%

Sodium 1,562 mg68%

Total Carbohydrate 38.5 g14%

Dietary Fiber 1.4 g5%

Total Sugars 6 g—

Protein 22.2 g44%

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

400

kcal

Protein22.2 g (22%)

Carbs38.5 g (38%)

Fat18.2 g (40%)

Estimated calorie contribution using 4 kcal/g for protein and carbohydrates and 9 kcal/g for fat.

Meal Planning Insights

Protein density5.6/10

22% of macro calories come from protein.

Satiety index10/10

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

Activity estimate100 min walk

About 40 minutes of running for these calories.

Key Nutrients

Protein 22.2 g44%

Fiber 1.4 g5%

Sodium 1,562 mg68%

Sugars 6 g—

Saturated Fat 6.4 g32%

How we calculate these values

Diet Compatibility

High protein5.6/10 protein density from 22.2g protein and 400 calories.Yes

Lower carb38.5g carbs per serving.No

Low fat18.2g total fat per serving.No

High sugar6g total sugars per serving.No

High sodium1,562mg sodium per serving.Yes

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

Ingredients

4" High Top Plain Bun Toasted, Burger Patty, Grilled Mushrooms, Grilled Onions, Swiss Cheese Slice, 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, Single has 76 fewer calories than 3 Piece Pub Battered Cod and 0.3g less protein. Compare

Mushroom Onion Melt, Single has 398 fewer calories than A&W Root Beer Cream Freeze, Large and 7.9g 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, Single Compared With Nearby Items

A&W Mushroom Onion Melt, Single is listed in the Hometown Favorites category with 400 calories, 22.2g protein, 38.5g carbs, and 18.2g fat per serving.

Data Source and Methodology

Nutrition values for Mushroom Onion Melt, Single 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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