Peel and chop the potatoes into small pieces. Boil them in a pot of water until tender.

Slice the onion finely.

Heat a pot and melt the butter until fragrant.

Reduce to low heat and sauté the onion until golden brown.

Combine the boiled potatoes and sautéed onions in a bowl.

Blend the potatoes and onions together with 2.5 cups of milk until smooth.

Transfer the blended mixture back to the pot and simmer on low heat until heated through.