Peel and chop the potatoes into 1-inch pieces, then place them in a large pot and cover with cold, salted water.

Bring the water to a boil, then reduce heat and simmer until potatoes are tender, about 15-20 minutes.

While potatoes cook, melt butter in a small saucepan over medium heat, then add minced garlic and sauté for 1-2 minutes until fragrant.

Drain the cooked potatoes thoroughly and return them to the pot.

Mash the potatoes with a potato masher or fork, then gradually add the warm milk, garlic butter, salt, and pepper, mixing until smooth and creamy.