Preheat your oven to 400-degrees and place a pie of tinfoil on the top rack. Scrub and pat dry the potatoes, prick each several times with a fork. Place the potatoes on top of the tinfoil and bake under fork tender, about 1 hour.
6 large sweet potatoes
Remove from the oven to a cutting board. Use an oven mitt to hold the potato while you slice each in half lengthwise. Let the potatoes sit for 10 minutes.
Into a large mixing bowl, add the butter (cut into pieces). Scoop out the potato with a spoon and add it to the bowl. Discard the skins.
4 tablespoons butter
Using a potato masher, break up the potatoes and incorporate the butter.
Stir in the brown sugar and add a little of the milk at a time until you have the desired consistency. Season with salt and pepper.
¼ cup brown sugar, ¼ cup whole milk, Salt and Pepper to taste
Transfer the mashed sweet potatoes into a baking dish with a lid. Add an additional pat or two of butter to the top (optional) and cover.
These are ready to serve!
However, if you want to serve them later, place the dish in the fridge. When you want to serve the potatoes, place the dish in an oven pre-heated to 350-degrees and bake until heated through.