
Sonic offers a mushroom Swiss toaster melt sandwich, which features a 100% beef patty with sautéed Portobello mushrooms, Swiss cheese, grilled onions, and mayonnaise, sandwiched between Texas toast. Additionally, Sonic has introduced blended burgers, which include a mixture of beef and mushrooms in the patty, reducing the environmental impact of beef-intensive burgers. The blended burgers are called the Sonic Signature Slingers, and they contain 25% mushrooms.
| Characteristics | Values |
|---|---|
| Name | Mushroom Swiss Toaster Melt |
| Patty | 75% beef and 25% cooked mushrooms |
| Calories | 340 |
| Price | $1.99 |
| Availability | Nationwide |
| Type | Toaster melt sandwich |
| Ingredients | 100% beef patty, sauteed Portobello mushrooms, Swiss cheese, grilled onions, mayonnaise, Texas toast |
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What You'll Learn
- Sonic's Mushroom Swiss Toaster Melt contains beef, mushrooms, Swiss cheese, grilled onions, and mayonnaise
- The burger is available in two sizes, with prices starting at $1.99
- The burger is a collaboration with the Mushroom Council
- The Mushroom-Beef blend reduces the environmental footprint of the burger
- The blend also makes the burger healthier, with fewer calories and less fat

Sonic's Mushroom Swiss Toaster Melt contains beef, mushrooms, Swiss cheese, grilled onions, and mayonnaise
Sonic offers a Mushroom Swiss Toaster Melt that contains beef, mushrooms, Swiss cheese, grilled onions, and mayonnaise. The beef patty is made with 100% pure beef and is topped with sautéed Portobello mushrooms, Swiss cheese, grilled onions, and mayonnaise. This sandwich is served on Texas toast and was offered for a limited time at Sonic Drive-In for $1.99 for a smaller patty or $3.49 for a thicker, 1/4 pound beef patty.
The Mushroom Swiss Toaster Melt is part of a larger trend of blended burgers, which combine beef and mushrooms in the patty to create a more sustainable and environmentally friendly option. The Mushroom Council, an industry trade group, partnered with Sonic to develop this hybrid burger concept. By blending mushrooms into the patty, the environmental footprint of the burger is reduced. According to the World Resources Institute, if 30% of the beef in every burger in America were replaced by mushrooms, it would significantly reduce greenhouse emissions.
In addition to the environmental benefits, the blended burger also offers a healthier option for consumers. The mushroom-beef blend has less fat and fewer calories than a traditional burger. It also enhances the flavour of the burger by boosting the umami taste and adding moisture to the patty. This unique combination of beef and mushrooms creates a juicy and savoury burger that has been described as "uniquely delicious" by Sonic.
The introduction of the Mushroom Swiss Toaster Melt at Sonic Drive-In represents a significant step towards more sustainable and healthier fast-food options. By blending mushrooms into the beef patty, Sonic has created a burger that not only tastes great but also has a reduced environmental impact. This innovative approach to the classic American cheeseburger allows consumers to enjoy their favourite burger while contributing to a more sustainable future.
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The burger is available in two sizes, with prices starting at $1.99
Sonic Drive-In offers a mushroom Swiss toaster melt burger with a unique twist. The burger is available in two sizes, with prices starting at $1.99. For this price, you can enjoy a smaller version of the beef patty, which is packed with flavour and a juicy texture. If you're feeling particularly hungry, you can upgrade to a thicker, quarter-pound beef patty for $3.49.
The mushroom Swiss toaster melt is a creative take on the traditional burger. It features a 100% beef patty, sautéed Portobello mushrooms, Swiss cheese, grilled onions, and mayonnaise, all stacked between thick Texas toast. The combination of ingredients creates a burst of flavours and textures that will tantalize your taste buds.
What sets this burger apart is the addition of mushrooms, which not only enhances the taste but also makes it a more environmentally-friendly option. The patty contains roughly 25-30% mushrooms, reducing the environmental footprint of the burger. This blend not only makes the burger juicier but also lowers its fat and calorie content compared to a traditional burger.
The Sonic Signature Slinger, as it is called, was developed in partnership with the Mushroom Council. It represents a significant step towards sustainability, as reducing the need for beef has a positive impact on the environment. The burger was initially tested in select markets and received such a positive response that it was later rolled out nationwide.
With its blend of juicy flavours, eco-friendliness, and affordable pricing, the Sonic mushroom Swiss burger is a tempting option for anyone craving a delicious and innovative take on the classic burger.
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The burger is a collaboration with the Mushroom Council
The fast-food chain Sonic has introduced a new burger to its menu, the Mushroom Swiss Toaster Melt, which features a beef patty with sautéed Portobello mushrooms, Swiss cheese, grilled onions, and mayonnaise. However, the focus of this answer is on Sonic's collaboration with the Mushroom Council to create a blended burger patty with mushrooms and beef.
Sonic Drive-In, the Oklahoma City-based fast-food chain, introduced the blended burger patty, which combines beef with mushrooms, to its menu nationwide. The patty consists of 75% beef and 25% cooked mushrooms, resulting in a lower-calorie and environmentally-friendly option. The Mushroom Council's president, Bart Minor, expressed excitement about the partnership with Sonic, highlighting the unique taste and juiciness of the burger.
The blended burger initiative is part of a broader movement to reduce the environmental impact of beef consumption. By incorporating mushrooms, the carbon footprint is reduced as mushrooms produce fewer greenhouse gases. According to the World Resources Institute, if Americans replaced 30% of the beef in their burgers with mushrooms, it would significantly reduce CO2 emissions, save water and decrease the need for farmland.
The collaboration between Sonic and the Mushroom Council showcases a practical implementation of blended burgers in a mainstream fast-food setting, offering a more sustainable option to a wider audience. It represents a meaningful step towards reducing the environmental footprint of the food industry, particularly given the popularity of burgers in the United States.
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The Mushroom-Beef blend reduces the environmental footprint of the burger
Sonic introduced a mushroom-beef blend burger, the Sonic Slingers, in 2017. This blended burger is a more sustainable alternative to traditional beef burgers.
Beef is a resource-intensive food, requiring a lot of water and energy for its production. In fact, beef accounts for a large portion of food companies' greenhouse gas emissions. By blending mushrooms with beef, the environmental footprint of the burger is reduced. Mushrooms have a low environmental footprint as they require less water and energy to produce and generate fewer carbon dioxide emissions.
For example, producing one pound of button mushrooms uses less than 2 gallons of water, whereas other fresh produce items require an average of 50 gallons of water per pound. Similarly, growing one pound of mushrooms generates only 0.7 pounds of CO2 equivalents, whereas one gallon of fuel emits nearly 20 pounds of CO2.
Replacing 30% of the beef in burgers with mushrooms would reduce agricultural production-related greenhouse gas emissions, water demand, and global agricultural land demand. This reduction in environmental impact is equivalent to taking millions of cars off the road.
In addition to the environmental benefits, the mushroom-beef blend also offers health advantages. The blended burger has lower calories, saturated fat, and cholesterol compared to an all-beef burger.
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The blend also makes the burger healthier, with fewer calories and less fat
The fast-food chain Sonic Drive-In has introduced a new burger to its menu: a mushroom-beef blend patty with 75% beef and 25% cooked mushrooms. This blend makes the burger healthier, with fewer calories and less fat. Starting at $1.99, the Sonic Signature Slinger contains only 340 calories. The recipe includes just three ingredients: 100% pure beef, mushrooms, and seasonings. The chain's vice president of product innovation and development, Scott Uehlein, described the burger as delivering the "juicy, savory deliciousness you expect from a burger in a way that makes you feel like you're getting away with something."
The idea behind blending beef and mushrooms is to boost the umami taste, add moisture, and reduce the amount of beef required. This reduction in beef has a positive impact on the environment, as beef is the most resource-intensive food in the United States. By decreasing the amount of beef in the patty, the environmental footprint of the burger is reduced. The World Resources Institute calculated that if all 10 billion burgers consumed by Americans annually used blended patties with 30% mushrooms, it would result in substantial reductions in CO2 emissions, water usage, and farmland usage.
The blended burger concept was first proposed by the Mushroom Council, the trade body of cultivated mushroom growers, in collaboration with the Culinary Institute of America's Healthy Menus R&D Collaborative. The initiative, known as "menus of change," aims to promote improvements in health and environmental sustainability. The James Beard Foundation and the World Resources Institute have also been strong supporters of the blended burger movement. They recognize that while a complete shift to plant-based options may not be feasible for all consumers, reducing meat consumption through blended options can still have a significant environmental impact.
The Sonic Signature Slinger is an example of how fast-food chains can offer more sustainable and healthier options to their customers without compromising on taste. By blending mushrooms into the patty, Sonic has created a burger that is lower in calories and fat while still delivering the flavour and juiciness expected from a traditional burger. This innovation not only appeals to health-conscious consumers but also contributes to the broader goal of reducing the environmental impact of the food industry, particularly in the carbon-intensive beef sector.
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Frequently asked questions
Sonic Drive-In offers a Mushroom Swiss Toaster Melt, which features a 100% beef patty with sautéed Portobello mushrooms, Swiss cheese, grilled onions, and mayonnaise, sandwiched between Texas toast.
Adding mushrooms to a burger patty reduces the amount of beef needed, which has a positive impact on the environment. Blended burgers have fewer calories and less fat, and the mushrooms add moisture and boost the umami taste.
Yes, Sonic also offers the Signature Slinger, which contains 75% beef and 25% mushrooms. The Classic version comes with lettuce, tomato, diced onions, crinkle-cut dill chips, mayonnaise, and melted American cheese on a brioche bun. There is also a Bacon Melt variation with bacon, melted cheese, and mayonnaise on a brioche bun.

























