Potato and Celery Root Gratin Packets
Prep time
Cook time
Total time
Recipe type: Sides
Serves: 4-6
  • 1 - 1½ lbs potatoes, gold potatoes are best for this recipe, thinly sliced
  • 1 medium (10-12 0z) celery root, peeled and thinly sliced
  • 1 onion, thinly sliced
  • 2 garlic cloves, thinly sliced
  • 3 Tablespoons butter, melted (or oil)
  • ½ - ¾ teaspoon salt, ½ teaspoon ground black pepper
  • ½ Tablespoon dry herbs (parsley, thyme, rosemary, etc.)
  • 4-5 Tablespoons chicken or vegetable broth (1 - 1½ Tablespoons per packet)
  • 4-5 Tablespoons heavy cream (1 - 1½ Tablespoons per packet)
  • 8-10 Tablespoons finely grated Parmesan cheese
  • fresh herbs to garnish, such as dill, parsley, thyme, chives, etc, minced
  1. Preheat the oven to 400 degrees Fahrenheit. You can also do this on the grill, in which case you would preheat the grill to medium heat.
  2. Peel the potatoes and the celery root. Slice the potatoes and the celery root into really thin slices. If you have a mandoline, this is the best tool for the job, but you can certainly use a knife. If you don't want to use celery root, just use extra potatoes instead.
  3. Slice the onion very thinly, using a mandoline or a knife. Slice the garlic, but don't try using the mandoline, you might end up losing some fingertips:).
  4. Toss the sliced vegetables in a large bowl with the melted butter, salt, pepper and dry herbs. Use any seasonings that you like to flavor your potatoes - dry herbs (dill, thyme, oregano, parsley, basil, rosemary, etc.) or spices (paprika, cayenne pepper, nutmeg, etc.).
  5. Meanwhile, tear off 4 sheets of aluminum foil. I like using heavy duty aluminum foil. The sheets need to be 18 - 20 inches wide. Of course, you can also use parchment paper, if you will be making this in the oven. If you will be preparing this dish on the grill, I would suggest using a double layer of aluminum foil for each packet.
  6. Place ¼ of the vegetables into each packet, placing them on one half of the aluminum foil. You can also make the packets smaller and make 6 of them instead of 4. Spread out the vegetables so that they are in an even layer.
  7. Pour 1 - 1½ Tablespoons of broth and heavy cream, EACH, over the vegetables.
  8. Sprinkle with the finely grated Parmesan cheese, about 2 Tablespoons per packet, but the amount of cheese is up to you. Use more or less, depending on your preference. You can also use other cheese, such as Cheddar, Monterey Jack, Provolone, Mozzarella, Fontina, etc.
  9. Fold the second half of the aluminum foil over the vegetables and seal the edges all the way around, to form the packets.
  10. For the oven method: Place the packets on a large baking sheet and bake in the preheated oven for 35 minutes. You can open the packets at the end and place it under the broiler for a few minutes to crisp up the top, if you'd like.
  11. For the grill method: Place the packets on the grill and cook on medium heat for 30-35 minutes.
  12. Garnish with fresh herbs.
Recipe by Olga's Flavor Factory at https://www.olgasflavorfactory.com/recipes/ontheside/side-dishes/potato-celery-root-gratin-packets/