Response:  1. Impossible Burger - 480 calories
  2. Brioche Bun - 260 calories
  3. American Cheese - 50 calories
  4. Pickles - 4 calories
  5. Onions - 8 calories
  6. Tomatoes - 16 calories
  7. Lettuce - 5 calories
  8. Ketchup - 10 calories
  9. Mustard - 10 calories
  
  Total Calories: 853 calories