First, hand wash your sweet potatoes. After a complete washing, boil the sweet potatoes until they are tender. Once potatoes are tender drain and allow them to cool before peeling and mashing. Blend your sweet potatoes in mixing bowl with a blender to remove strings.

After the potatoes are ready, go ahead and preheat your oven to 350.

While you are cooking the sweet potatoes go ahead and place your butter on the kitchen countertop and allow to soften.

Next cream the softened butter with both sugars. Mix in the blended sweet potatoes and continue to mix while adding the eggs one at a time. Finally, add your milk, vanilla extract, nutmeg and salt and mix thoroughly.

Finally, pour mixture evenly into your four frozen unbaked pie shells. Bake for 1 hour and 30 minutes at 350°F on your center oven rack.