Place potatoes in a large stockpot and fill with water until the potatoes are covered. Bring to a boil over high heat. Then reduce heat to medium and simmer for 20-30 minutes, or until a fork will go gently through the potatoes. Remove from heat and drain the water.
Return pot to the burner. Pass potatoes through a food mill or ricer, or use a potato masher to mash the potatoes until smooth. Turn off heat, and add in butter, hummus, salt, and pepper. Stir until combined. Season with additional salt and pepper if needed. Then top with garnishes if desired.