Crockpot Butter Ranch Mushrooms

This may be one of the unhealthiest recipes I've posted, but it's also one of the easiest and most delicious.  My friends beg me to make these mushrooms whenever we're having a get together and I'm happy to oblige, because it's the easiest thing in the whole world.  My mother-in-law graced me with this recipe. 

Ingredients:
4 (8 oz) boxes fresh mushrooms (whole)
1 lb. butter
1 envelope dry ranch dressing

Dump everything into crockpot insert.  Cook on low 6-8 hours.  Serve hot.  Run an extra mile the next day.