Add the potatoes and broth to a pot and bring to a boil over medium-high heat.
Boil the potatoes until tender, about 15 minutes.
Using a slotted spoon transfer the potatoes to a large bowl, keeping the broth in the pot over medium-high heat.
Add the leeks to the pot and cook in the broth about 2 minutes.
Mashed the potatoes and stir in the butter, cream cheese, leeks, and any remaining broth.
