
Carl's Jr. has introduced a new Mushroom & Swiss All-Natural Burger, featuring an all-natural, charbroiled beef patty topped with Swiss cheese, sauteed mushrooms, tomatoes, mayonnaise, lettuce, and red onion on a Fresh Baked Bun. The burger, priced at $5.39 for a single patty and $7.89 for a double patty, is an extension of the All-Natural Burger line, which was launched in December 2014 and is now available at sister chain Hardee's.
| Characteristics | Values |
|---|---|
| Name | Mushroom & Swiss All-Natural Burger |
| Patty | Charbroiled all-natural beef patty |
| Toppings | Swiss cheese, sauteed mushrooms, tomatoes, mayonnaise, lettuce, red onion |
| Bun | Fresh Baked Bun |
| Calories | 790 |
| Calories from Fat | 430 |
| Fat | 48g |
| Saturated Fat | 13g |
| Sodium | 920mg |
| Carbs | 58g |
| Sugar | 13g |
| Protein | 33g |
| Price (single patty) | $5.39-$6.99 |
| Price (double patty) | $7.89 |
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What You'll Learn
- Carl's Jr. introduced the Mushroom Swiss Burger in 2015
- It is available with one or two all-natural beef patties
- The burger features Swiss cheese, sauteed mushrooms, tomatoes, mayo, lettuce, and red onion
- The price of the burger ranges from $4.49 to $7.89
- The burger was made permanent due to its popularity

Carl's Jr. introduced the Mushroom Swiss Burger in 2015
The burger was priced at $5.39 with a single patty and $7.89 with a double patty, although prices may vary. The all-natural patty could also be substituted into any burger on the menu for an additional charge. Nutritional information for the single patty burger lists 790 calories, 48g of fat, 13g of saturated fat, 920mg of sodium, 58g of carbohydrates, 13g of sugar, and 33g of protein.
The introduction of the Mushroom Swiss Burger at Carl's Jr. was supported by a provocative ad campaign titled "Natural Beauties," created by advertising agency 72andSunny. The TV spot debuted on July 27, 2015, and featured the newest Carl's Jr. advertising star. The ad campaign highlighted the natural ingredients and nutrients found in mushrooms, such as B vitamins, vitamin D, selenium, potassium, riboflavin, and niacin.
The Mushroom Swiss Burger received generally positive reviews. One reviewer noted that the burger hit the right marks in the mushroom and Swiss cheese department and was fairly enjoyable. They did, however, express a preference for a smaller, meatier burger. Another reviewer praised the savory quality of the beef and mushrooms, complemented by the melted Swiss cheese, which added a mild creaminess to the burger.
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It is available with one or two all-natural beef patties
Carl's Jr. introduced the Mushroom & Swiss All-Natural Burger in 2015. It is the first variation on the All-Natural Burger, which was launched in December 2014 and featured the first grass-fed, free-range beef with no added hormones, antibiotics, or steroids from a major fast-food company. The Mushroom & Swiss All-Natural Burger is available with one or two all-natural beef patties. With one patty, the burger costs $5.39, and with two patties, it costs $7.89. These prices may vary, and one source mentions the burger costing $6.99. The all-natural patty can also be substituted into any burger on the menu for an additional charge.
The burger features an all-natural, charbroiled beef patty along with a slice of natural Swiss cheese, natural sautéed mushrooms, vine-ripened tomatoes, mayonnaise, lettuce, and red onion on the chain's signature Fresh Baked Bun. The bun is described as having a soft, airy texture and a slight sweetness. The beef patty offers the chain's signature char flavor and a decent amount of moisture. The savory quality of the beef and mushrooms is complemented by the melted Swiss cheese, which lends a mild, creamy taste to the burger.
The introduction of the Mushroom & Swiss All-Natural Burger at Carl's Jr. coincided with the launch of the All-Natural Burger at its sister chain, Hardee's. The Hardee's All-Natural Burger features a charbroiled, all-natural beef patty topped with a slice of natural cheddar cheese, fresh tomatoes, red onion, lettuce, ketchup, mustard, mayonnaise, and dill pickles, all served on the brand's signature Fresh Baked Buns.
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The burger features Swiss cheese, sauteed mushrooms, tomatoes, mayo, lettuce, and red onion
Carl's Jr. introduced the Mushroom & Swiss All-Natural Burger in 2015. The burger features Swiss cheese, sauteed mushrooms, tomatoes, mayo, lettuce, and red onion. It is made with an all-natural, charbroiled beef patty and is served on the chain's signature Fresh Baked Bun.
The burger was first launched in December 2014 as the All-Natural Burger, which featured the first grass-fed, free-range beef with no added hormones, antibiotics, or steroids from a major fast-food company. The Mushroom & Swiss variation was the first line extension of this burger. It is priced at $5.39 with a single patty and $7.89 with a double patty, although prices may vary.
The burger was supported by an ad campaign titled "Natural Beauties," which aimed to highlight the health benefits of mushrooms. Bart Minor, president and CEO of the Mushroom Council, stated that mushrooms are a perfect pairing for the all-natural burger due to their natural, meaty flavor and important nutrients.
In addition to the Mushroom & Swiss All-Natural Burger, Carl's Jr. also offers a Portobello Mushroom Six Dollar Burger. This burger features sautéed Portobello mushrooms, often referred to as "the steak of vegetables," with a charbroiled 100% Black Angus beef patty. It is available for $4.89 or $7.39 as part of a combination meal.
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$5.32

The price of the burger ranges from $4.49 to $7.89
Carl's Jr. introduced the Mushroom & Swiss All-Natural Burger in 2015. It features an all-natural, charbroiled beef patty, a slice of Swiss cheese, sautéed mushrooms, vine-ripened tomatoes, mayonnaise, lettuce, and red onion on a Fresh Baked Bun. The burger is priced at $5.39 for a single patty and $7.89 for a double patty, although prices may vary by location.
In 2024, Carl's Jr. added the Portobello Mushroom Six Dollar Burger to its menu. This burger is priced at $4.89, or $7.39 as part of a combination meal. Portobello mushroom sauce can be added to any Carl's Jr. burger for an additional charge.
The Hardee's All-Natural Burger, available at Carl's Jr.'s sister chain, features a charbroiled, all-natural beef patty topped with a slice of natural cheddar cheese, fresh tomatoes, red onion, lettuce, ketchup, mustard, mayonnaise, and dill pickles, served on a Fresh Baked Bun. The Hardee's All-Natural Burger is available with a single patty for $4.49 or with two patties for $6.99, with prices varying by location.
The Mushroom & Swiss All-Natural Burger received generally positive reviews, with praise for the flavor of the mushrooms and the creaminess of the Swiss cheese. However, some reviewers noted that the patty was a bit thin for the burger's size and that the price was a bit high due to the use of grass-fed beef.
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The burger was made permanent due to its popularity
In 2015, Carl's Jr introduced the Mushroom & Swiss All-Natural Burger, its first variation on the All-Natural Burger. The burger features an all-natural, charbroiled beef patty, a slice of Swiss cheese, sauteed mushrooms, vine-ripened tomatoes, mayonnaise, lettuce, and red onion on the chain's signature Fresh Baked Bun.
The burger was priced at $5.39 for a single patty and $7.89 for a double patty, although prices may vary. The burger was well-received, with reviews praising the flavor of the mushrooms and the creaminess of the Swiss cheese. The burger's natural ingredients were also highlighted as a positive, with the mushrooms providing important nutrients such as B vitamins, vitamin D, selenium, and potassium.
The success of the Mushroom & Swiss All-Natural Burger can be attributed to several factors. Firstly, it offered a unique combination of flavors and ingredients that appealed to customers. The addition of sauteed mushrooms and Swiss cheese to the charbroiled beef patty created a savory and creamy taste profile that was well-liked by those who tried it. The burger's use of all-natural, grass-fed, free-range beef with no added hormones, antibiotics, or steroids also resonated with consumers, particularly those who were seeking more wholesome options in fast food.
Additionally, the timing of the burger's introduction played a role in its popularity. The Mushroom & Swiss All-Natural Burger was launched as an extension of the All-Natural Burger line, which had already proven successful for Carl's Jr. The original All-Natural Burger, launched in December 2014, was the first of its kind from a major fast-food company, and it brought in a new demographic of consumers who valued high-quality, ethically sourced ingredients. By extending this line with the Mushroom & Swiss variant, Carl's Jr. was able to build on the success of the original concept and cater to the evolving tastes of its customers.
Given the popularity of the Mushroom & Swiss All-Natural Burger, it is not surprising that Carl's Jr. decided to make it a permanent menu item. By doing so, the company could continue to capitalize on the burger's success and meet the demands of its customers. The decision to make the burger permanent also aligns with the company's commitment to innovation and providing a diverse range of options to suit varying dietary preferences and tastes.
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Frequently asked questions
Yes, Carl's Jr. introduced the Mushroom Swiss All-Natural Burger in 2015. It features an all-natural, charbroiled beef patty, Swiss cheese, sauteed mushrooms, tomatoes, mayonnaise, lettuce, and red onion on a Fresh Baked Bun.
The Mushroom Swiss Burger costs $5.39 with a single patty and $7.89 with a double patty. Prices may vary depending on location.
The Mushroom Swiss Burger has 790 calories, 430 calories from fat, 48g of fat, 13g of saturated fat, 920mg of sodium, 58g of carbohydrates, 13g of sugar, and 33g of protein.

























