Easy Garlic Butter Mashed Potatoes In the Slow Cooker or Crockpot. Need recipes and ideas for simple sides and side dishes that are comfort food approved? This creamy potato dish is perfect for holidays like Christmas or Thanksgiving. You'll need russet potatoes, garlic, butter and heavy cream. Russet Potato Recipes, Mashed Potato Recipes, Potato Dishes, Food Dishes, Crockpot Mashed Potatoes, Crock Pot Potatoes, Simple Mashed Potatoes, Make Ahead Mashed Potatoes, Homemade Mashed Potatoes