Place the potatoes in a colander and rinse under cold running water until the water runs clear.

Melt 4 Tbsp. butter in a large pan on the stove over medium heat. Add the garlic and sugar. Stir often for about three or four minutes until the garlic turns sticky and straw-colored.

Add the potatoes, half-and-half or milk, water, and 1 tsp. salt. Stir.

Raise heat and bring to a boil. Once boiling, reduce the heat to low and cover with a lid.

Simmer for about 25-30 more minutes, stirring occasionally, until most of liquid is absorbed and potatoes are tender.

Remove from heat, add eight more tablespoons of butter, and mash until smooth. If more liquid is needed, add 1/4 cup milk or half-and half and fold in with a spatula.

Season with salt and pepper to taste.