NutrimetryRestaurant nutrition made simple.

☰

Last updated: Aug 9, 2026

Firehouse Subs

Brown Sugar Caramelized Onions

Medium Sub ToppingsPopular

Firehouse Subs Brown Sugar Caramelized Onions is carb-leaning, with about 54% of macro calories from carb. Each serving has 27 calories, 0.3g protein, 3.8g carbs, and 1.3g fat, making it a lighter restaurant option to compare with larger meals.

1 Ounces (28.3g)

Serving Size

28.3 g

Serving Weight

Add to Meal Ask AI about this item

Calories

Per serving

0.3 g

Protein

3.8 g

Carbs

1.3 g

Fat

Nutrition Facts

Amount per serving

Calories27 kcal

% Daily Value*

Total Fat 1.3 g2%

Saturated Fat 0 g0%

Trans Fat 0 g—

Cholesterol 1 mg0%

Sodium 130 mg6%

Total Carbohydrate 3.8 g1%

Dietary Fiber 0.4 g2%

Total Sugars 2.5 g—

Protein 0.3 g1%

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

kcal

Protein0.3 g (4%)

Carbs3.8 g (54%)

Fat1.3 g (42%)

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

Meal Planning Insights

Protein density1/10

4% of macro calories come from protein.

Satiety index3.2/10

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

Activity estimate7 min walk

About 3 minutes of running for these calories.

Key Nutrients

Protein 0.3 g1%

Fiber 0.4 g2%

Sodium 130 mg6%

Sugars 2.5 g—

Saturated Fat 0 g0%

How we calculate these values

Diet Compatibility

High protein1/10 protein density from 0.3g protein and 27 calories.No

Lower carb3.8g carbs per serving.Yes

Low fat1.3g total fat per serving.Yes

High sugar2.5g total sugars per serving.No

High sodium130mg sodium per serving.No

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

Ingredients

YELLOW ONIONS, SOYBEAN OIL, BUTTER (CREAM, SALT), WATER, CONTAINS LESS THAN 2% OF SALT, NATURAL FLAVOR (MILK), BETA CAROTENE(COLOR). SPICE BLEND MIX: GARLIC POWDER, DEHYDRATED GARLIC, SALT, MALTODEXTRIN, PARSLEY, AUTOLYZED YEAST EXTRACT, ROASTED GARLIC…

Allergens

Contains

WheatMilkSoy

Similar Items in Medium Sub Toppings

View all

Au Jus Bell Peppers3 kcal · 0.1 g protein Au Jus Mushrooms5 kcal · 0.6 g protein Avocado80 kcal · 1 g protein

Compare with other items

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

Quick comparisons

Brown Sugar Caramelized Onions has 123 fewer calories than 1% Chocolate Milk and 6.7g less protein. Compare

Brown Sugar Caramelized Onions has 63 fewer calories than 1% Milk and 6.7g less protein. Compare

1% Chocolate Milk150 kcal · 7 g protein1% Milk90 kcal · 7 g protein5-Cheese Mac & Cheese380 kcal · 17 g proteinApple Juice100 kcal · 0 g proteinAu Jus Bell Peppers5 kcal · 0.2 g proteinAu Jus Bell Peppers3 kcal · 0.1 g protein

Compare with 1% Chocolate Milk

Brown Sugar Caramelized Onions Compared With Nearby Items

Compared with Au Jus Mushrooms, another Medium Sub Toppings item at Firehouse Subs, Brown Sugar Caramelized Onions has 22 more calories than it and 0.3g less protein than it. That makes this page useful for deciding between nearby menu choices, not just reading a raw nutrition label.

Data Source and Methodology

Nutrition values for Brown Sugar Caramelized Onions 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

Ask AI about this item

Get personalized nutrition advice and meal ideas.

Is this good for muscle gain?Can I eat this while cutting?

Ask AIAsk Nutrimetry AI