Celery Root and Potato Puree

A bowl of potato and celery root puree with a spoon on a wooden surface

An easy, sophisticated puree of celery root and potatoes.  Unbelievably creamy and delicious and completely make-ahead.  A great option for elegant and effortless entertaining!


4 large russet potatoes, peeled and cut into 1 ½ inch chunks

2 large celery roots, peeled and cut into 1 inch chunks

½ onion, quartered

4 cups water

4 cups whole milk

1 tablespoon coarse salt, plus more to taste

8 tablespoons (1 stick) unsalted butter

Freshly ground pepper


  1. Transfer half of the potatoes and celery root to a food processor along with 4 tablespoons of butter.  Process until smooth and transfer to a serving bowl. Repeat with remaining potatoes, celery root and butter.  Season to taste with salt and pepper. Serve. (Puree can be prepared a day ahead and reheated in the microwave or on the stovetop just before serving).


This recipe can easily be halved for a smaller crowd.

Keywords: celery root, celeriac, potatoes, puree, mashed potatoes, easy side dish, make ahead side dish, root vegetable mash