Peel the sweet potatoes and cut them into chunks.

Place the sweet potato chunks in a large pot and cover them with water.

Add salt to the water and bring it to a boil. Cook the sweet potatoes until they are fork-tender, about 15-20 minutes.

Drain the sweet potatoes and return them to the pot.

Add butter and milk to the pot and mash the sweet potatoes using a potato masher or a fork.

Season with salt and pepper to taste.

Serve the mashed sweet potatoes warm.