A Lean, Flavorful Option for Health-The Grilled Chicken Breast Sub from Firehouse Subs is a perfect match. It’s built for those who want a healthier, protein-packed choice without sacrificing flavor.
Made with tender grilled chicken and served hot on toasted bread, this sub keeps things simple — and simply delicious.
This sub is all about balance: lean protein, melty cheese, and fresh ingredients that come together in one toasty, crave-worthy meal.
Here’s what’s inside:
Grilled, all-white meat chicken breast
Melted provolone cheese
Served hot with your choice of toppings on a toasted sub roll
You can keep it classic or customize it with lettuce, tomato, onion, pickles, and sauces to make it your own.
The grilled chicken is juicy and seasoned to perfection — not dry, not bland — just right.
The Grilled Chicken Breast Sub fits almost any mealtime. It’s a great choice for:
Lighter lunches — low-fat protein keeps you full without weighing you down
Post-workout meals — packed with lean protein to refuel your body
On-the-go dinners — quick, hot, and healthier than fast food
Diet-friendly cravings — satisfying without the guilt
This is a go-to sub when you want flavor and freshness without going heavy on calories or fat.
Here’s why health-conscious customers love this sub:
Lean protein: Great for building muscle and staying full
Lower fat than most Firehouse meat subs
Fewer calories (especially if ordered as a small or without cheese/sauce)
Customizable to meet keto, low-carb, or low-calorie goals
You can even skip the bread and order it as a salad-style bowl.
Whether you’re watching your diet or simply love lean protein, the Grilled Chicken Breast Sub at Firehouse Subs stands out as a top pick. Customers often ask about its nutritional value, customization options, and how it compares to other subs. Below are the most common questions — with detailed answers to help you decide if this sub is right for your next meal.
No, the Grilled Chicken Breast Sub is not spicy on its own. It features grilled chicken with mild seasoning and is topped with provolone cheese — both of which are known for rich flavor without heat.
However, if you’re craving something with a little extra kick, you can customize your sub with jalapeños, hot sauce, or Firehouse’s signature Captain Sorensen’s Datil Pepper Hot Sauce. Firehouse Subs is known for its hot sauce bar, so spice lovers have plenty of ways to turn up the heat.
Yes, it’s one of the healthiest hot subs on the Firehouse menu. The grilled chicken is a lean source of protein, and when paired with a few light toppings, it becomes a nutritious meal option.
Here’s why health-conscious customers choose it:
Lower fat than fried or processed meats
Fewer calories (especially in the small or medium size)
Great for high-protein diets
Can be made low-carb if ordered as a sub bowl or without bread
To keep your meal extra healthy, skip heavy sauces and load up on fresh veggies like lettuce, tomatoes, and onions.
Absolutely — Firehouse Subs encourages customization. You can tailor nearly every part of your sub to fit your taste or dietary needs.
Common ways to customize include:
Add or remove toppings (lettuce, tomato, pickles, onions, jalapeños, etc.)
Swap the cheese or remove it altogether
Choose a different sauce (honey mustard, light mayo, spicy mustard, or none)
Change the bread type or go bread-free with a salad-style sub bowl
This makes it easy to enjoy your sub exactly how you like it — spicy, saucy, or super clean.
The medium size of the Grilled Chicken Breast Sub typically contains:
Calories: 500–600
Protein: 30–35g
Fat: Around 15g
Carbs: Varies based on bread and toppings (usually 40–50g)
These numbers can change depending on how you customize your order, so if you’re tracking calories or macros, check the official Firehouse Subs nutrition calculator online.
Yes, the Grilled Chicken Breast Sub is a core menu item, meaning it’s available at all participating Firehouse Subs locations year-round. It’s not a limited-time offer, so you can enjoy it whenever the craving strikes — whether you’re stopping in after the gym or grabbing a lighter lunch at work.
If you’re unsure, you can always check your local Firehouse Subs menu through the app or website.