|Source||From Bon Appetit|
|Prep time||30 minutes|
|Cooking time||30 minutes|
|Total time||1 hour|
Member Devon Karn says, "This is one of my favorite things: I made it for Thanksgiving last year, and about a hundred times since then."
Bring milk, water, and salt to a boil in a heavy, large saucepan over high heat. Add celery root cubes, potato cubes, and onion quarters; bring to a boil. Reduce heat to medium and simmer until vegetables are tender, about 30 min.
To puree, drain vegtables, discarding cooking liquid. Or, if using a blender, reserve a little of the cooking liquid. Combine vegetables and butter in food processor or blender and puree until smooth. Transfer to a serving bowl and sprinkle with fresh chopped chives. Serve warm.