Firehouse Subs Engineer | Price, Recipe & Review | 2026

Are you hungry and looking for something that hits different? The Firehouse Subs Engineer Sub is the real champion on the restaurant menu. It’s made with tender smoked turkey breast, blanketed in gooey Swiss cheese, and loaded with savory sautéed mushrooms and onions. This artisan sub is engineered with heavenly ingredients for umami flavors. Every bite of the sub provides a juicy, smoky, and creamy texture covered in soft bread. If you’re like me, who loves a burst of unique flavors in one bite, Firehouse Engineer Sub is the best thing since sliced bread.

• Small – $5.99: Great if you’re just a little hungry or grabbing a quick bite on the go.
• Medium – $9.69: The classic choice — plenty of smoked turkey, melty Swiss, and mushrooms to keep you satisfied.
• Large – $12.69: When you’re all in and want that sub loaded, hot, and hearty.

Choose your Bread

• White Bread: $0.00
• Wheat Bread: $0.00
• Gluten-Free Roll: $1.00 (availability varies)

Choose Extra Toppings

• Swiss Cheese (extra slice): $0.25
• Bacon: $1.00
• Double Meat (smoked turkey): $1.25
• Banana Peppers: $0.00
• Jalapeño Peppers: $0.00
• Black Olives: $0.00
• Chopped Pickles: $0.00
• Red Wine Vinegar: $0.00
• Oil (olive or vinaigrette): $0.00
• Black Pepper: $0.00
• Salt: $0.00

Visit also: Firehouse Subs Port Arthur

Other Side Options

• Chips (Lay’s, Cheetos, etc.): $1.99
• Side Salad: $4.99
• Firehouse Chili: Cup $3.99 / Bowl $4.99
• Loaded Potato Soup: Cup $3.99 / Bowl $4.99
• Five Cheese Mac & Cheese: $4.99
• Cookies (chocolate chip, oatmeal, etc.): $1.49
• Brownie: $1.99

Remove Options

• No Mushrooms
• No Swiss Cheese
• No Mayo
• No Deli Mustard
• No Pickle Spear

• Small: 350 kcal
• Medium: 690 kcal
• Large: 1120 kcal

Are you curious what’s inside in the Engineer Sub of the Firehouse restaurant? Here’s the full nutrition breakdown for small, medium, and large so you know before you dig in.

Small Sub

Medium Sub

Check also: Firehouse Subs Canada Menu

Large Sub

Check also: Firehouse Subs Owensboro

Visit also: Firehouse Subs Allergen

Firehouse Subs Engineer Sandwich is famous for its rich and savory flavors. What if I told you that you can recreate this artisan item at home by following the authentic recipe of Firehouse Subs restaurant? The making of the Engineer sub is a piece of cake!

• Prep Time: About 20 minutes
• Cook Time: Around 10 minutes
• Total Time: About 30 minutes

Ingredients

1. 1 fresh sub roll (white or wheat)
2. 8–10 oz smoked turkey breast, thinly sliced
3. 2 slices of Swiss cheese
4. 1/4 cup sautéed mushrooms
5. 1/4 cup grilled onions (optional, for extra flavor)
6. 1 tablespoon mayonnaise
7. 1 tablespoon deli mustard
8. Olive oil or butter for toasting

Making Process

Step No. 1: Sauté Mushrooms and Onions

Heat a medium-sized skillet over low heat, add 1 or 2 tablespoons of olive oil or butter, and sauté the onions and mushrooms until they become golden and tender like cotton.

Step No. 2: Smoked Turkey Slices

Heat the same skillet over medium heat and warm smoked turkey slices for 3-4 minutes. If you like unique flavors, you can squeeze a lemon.

Step No. 3: Warm the Sub roll

Sprinkle some drops of olive oil on the same skillet and lightly toast the sub roll for crispiness.

Step No. 4: Mayonnaise and Mustard

Mix the mayonnaise and mustard and spread the mixture inside the roll.

Step No. 5: Add Smoked Turkey and Toppings

Add warmed slices of hot smoked turkey and a layer of Swiss cheese slices on top of the smoked turkey.

Step No. 6: Add Sautéed Vegetables

Add freshly sautéed mushrooms and onions over the cheese and close the sub roll.

Step No. 7: Serving

Cut the sub from the middle and serve it warm with fries and a refreshing drink.

Check also: Firehouse Subs Italian

Five Cheese Mac & Cheese

You can try Firehouse Subs Engineer Sandwich with Five Cheese Mac & Cheese for a creamy and ultra‑cheesy experience—it’s like a warm hug in every bite.

Firehouse Chili

Suppose you’re one of those who like mildly spicy and rich flavors in every bite. In that case, you can try the Engineer Sub and Firehouse Chili hearty combo.

Brownie

If you have a sweet tooth like mine, Firehouse Subs Brownie and Engineer Sub is a match made in heaven.

I tried the Firehouse Subs Engineer Sandwich for the first time on my friend’s recommendation, and honestly, the first bite of the sub surprised me in the best way. Every bite of the sub provides savory and rich flavors of smoked turkey, Swiss cheese, and sautéed mushrooms and onions. The quality of the sub roll is also providing a premium feel—it’s soft without getting soggy. If you’re looking for something for your lunch, Firehouse Engineer Sub is the best option. We recommend you try this sub with Five Cheese Mac & Cheese to get a creamy and ultra‑cheesy experience.

Firehouse Engineer Sub is one of the hottest-selling items at the restaurant. The Engineer Sub is available in three serving sizes: the small size contains 350 calories, the medium size contains 690 calories, and the large sub contains 1120 calories. The price of an Engineer Sub varies depending on your location. The sub contains egg, gluten, milk and nitrates components. If you have allergies, you should avoid this sub or request the restaurant staff for allergens free sub if possible. So what are you waiting for? Visit the nearest location now and try this artisan sandwich to satisfy your taste buds.