classic mashed potatoes

INGREDIENTS 5 pounds Russet or Idaho potatoes, peeled and cut into pieces that are generally the same size 1-1.5 cups whole milk (add as you go) 1 bay leaf 4 sprigs of thyme 8 tablespoons butter, cubed (1 stick) 1 heaping spoonful of sour cream (about 1/4 cup total, but just use a big spoon) […]