Crockpot Mashed Potatoes

Bring a large pot of salted water to a boil. Add potatoes, garlic and chicken bouillon cubes. Cook potatoes until tender but still firm, about 15 minutes. Drain, reserving a little of the cooking water. Mash potatoes with sour cream and cream cheese, adding reserved cooking water to reach desired consistency. Transfer to a 4 quart crockpot, cover, and cook on low for 2 to 3 hours. Just before serving, stir in butter and season with salt and pepper to taste. Serves 8-10