We went the more classy route this Thanksgiving and made real mashed potatoes. These were delicious. The basic recipe is below and then you just need to season them however you like. We just used salt, pepper, and garlic. If you are making these for Thanksgiving, you can peel and cube the potatoes the night before. Just store in water overnight.
Source: adapted from Allrecipes
6 medium russet potatoes, peeled and cubed
1 cup warm milk
1/2 cup butter or margarine
salt and pepper and garlic salt to taste
Place potatoes in a saucepan and cover with water. Cove and bring to a boil; cook for 25-25 minutes or until very tender. Drain well. Add milk, butter, salt, pepper, and garlic salt to taste. Mash until light and fluffy.