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There are 498 calories in a 1 sandwich serving of Which Wich Turkey Sandwich. Calorie breakdown: 6% fat, 65% carbs, 28% protein.
Calories in Your Sandwich. One cup of grilled portobello mushroom slices contains just 35 calories. A hamburger bun has about 117 calories, while two slices of whole-wheat bread contain about 161 calories, so a plain sandwich may contain 152 or 196 calories, respectively. The calorie count will climb, of course, as you add toppings.