There are 660 calories in a Single Mushroom & Swiss Burger from McDonald's. Most of those calories come from fat (48%).
|Serving Size||1 burger|
|Amount Per Serving|
|Calories From Fat||320|
*All percent daily value figures are based on a 2,000 calorie diet.
Weight Watchers Freestyle Points: 21
Weight Watchers SmartPoints: 21
Weight Watchers PointsPlus: 18
Please keep in mind that most fast food restaurants cannot guarantee that any product is free of allergens as they use shared equipment for prepping foods.