Crock Pot Mashed Potatoes

I think these will be perfect for Thanksgiving.....

Crock Pot Mashed Potatoes
5 lbs. baking potatoes, peeled, cut into 1-inch chunks
1 1/2 c. chicken broth 
1/4 c. butter or margarine, cut into chunks
1 c. sour cream or plain yogurt
1 t. garlic powder
1 t. onion powder
1/2 t. salt
1/4 t. ground black pepper
1/2 to 1 c. milk, warmed
In 4- to 5-quart slow cooker, place potatoes, chicken broth and butter.
Cover; cook on High heat setting about 4 hours or until potatoes are tender.
Add remaining ingredients except milk. Mash, crush or smash potatoes using potato masher, or beat with electric mixer on low speed until well blended. Do not overmix. Stir in enough milk for desired creamy consistency. Cover and keep warm on Low or Warm heat setting until serving time, up to 2 hours. Stir before serving.