Ranch Potatoes

5 pounds peeled and cubed potatoes
1 (8 ounce) package cream cheese, softened
1 (1 ounce) package ranch dressing mix
4 tablespoons heavy cream (optional)
1 pinch salt

Bring a pot of salted water to a boil. Add potatoes; cook until tender but still firm. Drain, and transfer to a large bowl.
Before mashing potatoes, add the cream cheese, salad dressing, cream and salt.
Beat with a mixer until smooth. Serve immediately.