Peel the sweet potatoes and cut them into uniform 1-inch cubes.
Place the cubes into a large pot and cover with cold water, adding a pinch of salt.
Bring the water to a boil over high heat, then reduce to a simmer and cook for 15 to 20 minutes until the potatoes are fork-tender.
Drain the potatoes thoroughly in a colander and return them to the warm pot to allow excess steam to evaporate.
Add butter, milk, salt, pepper, and maple syrup to the pot.
Mash using a potato masher or an electric hand mixer until the desired smooth consistency is reached.
Serve immediately while hot.