Place halved potatoes in a large stock pot and cover with cold water. Bring to a boil then simmer until fork tender, about 15 minutes. Strain potatoes then return to the pot.
Add olive oil to the warm potatoes then, using a potato masher, begin mashing the potatoes. Slowly add in the milk and continue mashing. Note: you may also pulse in a food processor for a smoother consistency.
Once the potatoes are mashed, stir in the hummus. Check for seeasoning and add salt and pepper to taste. Return pot to a medium heat and cook until potatoes are warmed through, about 2-3 minutes. Serve warm.