Jack in the Box Sourdough Jack Price, Calories & Review

Last Updated: June 2026

Disclaimer: Prices and nutrition information are estimates collected from publicly available menus and nutrition sources. Actual values may vary by location and menu updates.

The Jack in the Box Sourdough Jack costs $6.79 to $6.89 for the sandwich alone in 2026, with combo meals running from $9.79 to $10.78 depending on size. It contains 690 to 700 calories and has held a permanent spot on the Jack in the Box menu for nearly three decades. If you are here for a fast answer before placing your order, the short version is this: the Sourdough Jack is worth ordering, and the grilled sourdough bread is the main reason why. The full breakdown of price, nutrition, ingredients, comparisons, and what to watch out for is all below.

Sourdough Jack At a Glance

Prices vary by region and platform. Delivery orders through DoorDash or Uber Eats typically add $1.00 to $1.50 above in-store pricing before delivery fees. Nutrition figures are based on available Jack in the Box data and may vary slightly with recipe updates.

What Makes the Sourdough Jack Different

Most fast food burgers use a soft sesame seed bun or a brioche roll. The Sourdough Jack takes a different approach. It is built on two thick slices of sourdough-style bread, buttered and grilled on a flat top until the outside turns golden and lightly crispy while the inside stays soft and chewy. That bread choice is not a gimmick. The sourdough fermentation process gives the bread a mild, natural tanginess that changes how every other ingredient in the sandwich tastes. The beef reads smokier against it. The Swiss cheese reads creamier. The bacon reads sharper.

No other major fast food chain builds a standard menu burger on grilled sourdough bread the way Jack in the Box does with this sandwich. That is why it has stayed on the menu since the early 1990s and why customers who try it tend to come back for it specifically.

Sourdough Jack Price in 2026

California locations, which represent around 43 percent of all Jack in the Box restaurants nationwide, tend to sit at the higher end of the price range. Texas, Arizona, Nevada, and the Pacific Northwest locations generally run slightly lower. Prices can also differ depending on whether you order in-store, through the drive-thru, or via a delivery platform.

The most reliable way to reduce the cost of your order is through the Jack in the Box app. Digital exclusive deals and combo discounts rotate regularly and are not available at the counter. Current promotions are listed on the discounts and deals page and through the rewards program, which lets you earn points on every qualifying purchase and redeem them for free food.

Sourdough Jack Calories and Full Nutrition Facts

Nutrition information is based on available Jack in the Box nutrition data and may vary with recipe updates or location-specific preparation.

At 690 to 700 calories, the Sourdough Jack sits above a McDonald’s Big Mac at 590 calories and a Burger King Whopper at 660 calories. The higher count comes primarily from the buttered sourdough bread and the hickory-smoked bacon, both of which are standard inclusions rather than paid add-ons. The protein content of up to 35 g is a genuine strength for a single fast food sandwich and makes this burger genuinely filling without needing sides to complete the meal.

Sodium is where you need to pay attention. At 1,220mg to 1,370mg per sandwich, the Sourdough Jack alone covers between 53 and 60 percent of the 2,300mg daily sodium limit recommended by the American Heart Association for most adults. If you are monitoring salt intake, this is the number that should inform your decision more than the calorie count. The complete nutrition breakdown for every item across the full menu is on the nutrition page.

What Is Actually in the Sourdough Jack: Full Ingredients

Sourdough Bread: Two thick slices of sourdough-style bread, buttered and grilled flat until golden on the outside with a soft, chewy interior. The sourdough fermentation gives the bread a mild tanginess that sets this burger apart from any standard bun burger at any competing chain.

100 Percent Beef Jumbo Patty: A thick, seasoned beef patty grilled to order. Jack in the Box uses 100 percent beef in this patty with no fillers specified. The grilling process produces a slightly smoky finish that works well alongside the bacon and Swiss cheese.

Hickory-Smoked Bacon: Two strips of hickory-smoked bacon as a standard part of the build, not an optional upgrade. The bacon is crispy, savory, and smoky in a way that directly complements the tanginess of the sourdough bread.

Swiss-Style Cheese: A processed Swiss-style cheese slice that melts smoothly over the patty. Swiss cheese is milder than American or cheddar, which is exactly right here because the sourdough bread already brings its own sharpness. The two flavors work together rather than competing.

Fresh Tomato: One to two thick-cut tomato slices that add juiciness and a clean freshness to offset the richness of the meat, cheese, and bacon.

Mayonnaise: A generous spread on the bread that adds creaminess and helps tie the flavor of every other ingredient together. Mayo is the most impactful single ingredient to remove if you are watching calories.

Ketchup: A light layer that adds sweetness and mild acidity, rounding out the overall savory flavor profile.

Butter: Applied to the sourdough bread before grilling. It contributes to the golden color of the crust and adds a slight richness to each bite of the outer bread layer.

Customization Options

You can modify the Sourdough Jack through the app or at the counter. Common modifications include removing the mayo to save approximately 80 to 90 calories and around 9 to 10g of fat, adding mustard or buttermilk ranch for a different flavor angle, or requesting the Good Good Sauce at locations where it is available as an add-on. Doubling the patty is possible at most locations and brings the total calorie count to approximately 1,000 calories, which suits customers who want a more substantial meal.

Allergen Information

The Sourdough Jack contains wheat from the sourdough bread, milk from the butter and Swiss-style cheese, eggs from the mayonnaise, and soy from shared preparation surfaces and certain ingredient formulations. Customers with gluten intolerance, celiac disease, or any of the above allergies should not order this sandwich in its standard form. The complete allergen chart for every item on the menu, including cross-contact risks, is on the allergen page.

Sourdough Jack vs Jumbo Jack: Which One Should You Order?

The Jumbo Jack is the better call if you want a straightforward fast-food burger at a lower price with less sodium. The Sourdough Jack is the better call if you want a more distinctive flavor experience, and the included bacon justifies the extra cost for you. The roughly $2.00 price difference reflects real ingredient differences, both the grilled sourdough bread and the hickory-smoked bacon, that are clearly detectable in the final sandwich. The full burger lineup, including calorie and price comparisons across every option, is on the burgers page.

Sourdough Jack vs Sourdough Smashed Jack

Jack in the Box introduced the Sourdough Smashed Jack as a newer variation using the same grilled sourdough bread but with a completely different ingredient build. The original Sourdough Jack uses a thick beef patty, hickory-smoked bacon, Swiss-style cheese, tomato, mayo, and ketchup. The Sourdough Smashed Jack replaces those with a thinner smashed beef patty, American cheese, pickles, grilled onions, and Boss Sauce. It costs significantly more at around $9.79 and delivers a tangier, lighter flavor profile.

The Boss Sauce on the Smashed Jack is sweet and tangy and resembles a classic fast-food secret sauce. It drives most of the flavor on that sandwich. However, the thinner patty lacks the meatiness of the original. For customers who want a filling, savory burger with bold flavor from the beef and bacon, the original Sourdough Jack is the stronger choice.

Is the Sourdough Jack Healthy?

At 690 to 700 calories and 45 g of total fat, the Sourdough Jack is not a low-calorie option. On a standard 2,000-calorie daily diet, it accounts for roughly 35 percent of total daily calories in a single sandwich. The protein content of up to 35 g is a genuine positive and makes this one of the more filling items on the menu without needing fries or a drink alongside it.

Customers focused on lower-calorie ordering at Jack in the Box will find better options on the lighter options menu or in the dedicated low-calorie items guide. For customers following a low-carb approach, the keto menu guide covers how to modify orders at Jack in the Box, including what to do about the sourdough bread.

The sodium, at up to 1,370 mg per sandwich, is the main concern. According to the American Heart Association, most adults should stay under 2,300mg of sodium per day, with an ideal target closer to 1,500mg for those managing blood pressure. The Sourdough Jack, on its own, puts most people close to or past the ideal limit before accounting for any other food in the day.

How to Order the Sourdough Jack for the Best Value

Download the Jack in the Box app first. Digital exclusive offers through the app rotate regularly and frequently include combo discounts that are not available at the register. Checking the app before you order is the most reliable way to pay less. Active deals are also listed on the deals and digital exclusives page.

Choose the regular combo, not the large. Upgrading to large typically costs around $0.50 more but adds significant calories and sodium through the larger fries and drink. The regular combo offers the best balance of portion size and value for most customers. Full combo pricing and what each size includes is covered on the burger combos page.

Remove the mayo if you are watching calories. This single modification saves approximately 80 to 90 calories and reduces fat by around 9 to 10 g. It does not meaningfully change the flavor of the sandwich because the sourdough bread, Swiss cheese, bacon, and beef carry the overall taste profile without relying on the mayo.

Pair it with water or an unsweetened drink. The Sourdough Jack is already high in sodium. Adding a large soda or a shake compounds the calorie and sugar load quickly. The full drinks menu with calorie comparisons is on the drinks page.

Is the Sourdough Jack Available All Day in 2026?

Yes, but only from 10:30 am onward. The Sourdough Jack is a permanent lunch and dinner menu item and is not available during breakfast hours. Jack in the Box serves breakfast until 10:30 am at most locations, after which the lunch and dinner menu, including the Sourdough Jack, becomes available. Full details on when breakfast ends and what is available before 10:30 am are on the breakfast hours page and the” Does Jack in the Box serve breakfast all day guide.

The Sourdough Jack is also part of the late-night menu at locations that operate past midnight. Full late-night availability and what else is served after midnight are on the late-night menu page.

Final Verdict

The Sourdough Jack remains one of the most distinctive burgers on the Jack in the Box menu because of its grilled sourdough bread, hickory-smoked bacon, and Swiss-style cheese working together in a way that a standard sesame-bun burger simply cannot replicate. For customers who want something genuinely different from a traditional fast-food cheeseburger, it continues to be a well-regarded and popular choice.

The sodium content is the one real tradeoff worth acknowledging before you order. At up to 1,370mg per sandwich, it is a high-sodium meal, and pairing it with a large soda and fries will push the total well past what most people should consume in a single sitting. Order it with water, skip the large upgrade, and remove the mayo if calories matter to you.

Everything else about this sandwich holds up. The price relative to what you get, the protein count, the texture and flavor of the grilled sourdough bread, and the overall eating experience compare favorably to similarly priced burgers at every competing chain in 2026. If you have never tried it, it belongs at the top of your list the next time you visit.

For a full overview of everything currently on the menu, including new additions, current deals, and seasonal items, visit the Jack in the Box menu home page.

Frequently Asked Questions

How many calories are in the Jack in the Box Sourdough Jack? 

The standard Sourdough Jack contains 690 to 700 calories. Combo versions range from 730 to 1,940 calories, depending on the size selected and the sides included.

What bread does the Sourdough Jack use? 

Two thick slices of sourdough-style bread, buttered and grilled on a flat top until golden and lightly crispy on the outside. The sourdough fermentation process gives the bread a mild tanginess that makes this burger taste distinctly different from any standard fast-food bun burger.

Does the Sourdough Jack come with bacon? 

Yes. Hickory-smoked bacon is a standard ingredient included in the base price, not a paid add-on.

Is the sourdough bread at Jack in the Box real sourdough? 

It is sourdough-style bread made using a sourdough fermentation process that produces the characteristic tangy flavor and firmer texture. The flavor difference compared to a standard fast-food sesame bun is real and noticeable.

What is the difference between the Sourdough Jack and the Sourdough Smashed Jack?

The original Sourdough Jack uses a thick beef patty, hickory-smoked bacon, Swiss-style cheese, tomato, mayo, and ketchup. The Sourdough Smashed Jack uses a thinner smashed patty, American cheese, pickles, grilled onions, and Boss Sauce. The Smashed version costs around $9.79 and has a tangier, lighter flavor. The original is more filling and savory overall.

What cheese comes on the Sourdough Jack? 

Swiss-style processed cheese. It melts smoothly over the beef patty and has a milder flavor than American or cheddar, which pairs well with the tanginess of the sourdough bread.

Can I remove the mayo from the Sourdough Jack? 

Yes, through the app when ordering or by requesting it at the counter. Removing mayo saves approximately 80 to 90 calories and reduces total fat noticeably without significantly changing the core flavor.

Is the Sourdough Jack available during breakfast hours? 

No. It is available from 10:30 am onward. The full breakfast menu and hours are covered on the breakfast page.

How much sodium is in the Sourdough Jack? 

Between 1,220 mg and 1,370 mg, depending on location and preparation, which represents roughly 53 to 60 percent of the daily sodium limit of 2,300 mg recommended by the American Heart Association.

Where can I find current deals on the Sourdough Jack? 

Through the Jack in the Box app, on the rewards program page, and on the discounts and deals page at jackintheboxmenunow.com.