You can easily double this recipe if needed to serve more people, but I would not bother doubling the Dijon-Cheddar Sauce - it makes enough as written. We only used about half of it for our mushrooms, then my daughter and I found the rest of the sauce worked awesome as an impromptu fondue for crusty bread.
Calorie count is purely an estimate calculated using an online application to serve as a guide and not to be taken as accurate nutritional information. Percent Daily Values are based on a 2,000 calorie diet.