Equipment
Ingredients
Root Vegetables
- 300 g yukon gold potato, peeled and diced into 2.5cm cubes
- 300 g celery root, peeled and diced into 2.5cm cubes
- 200 g turnip, peeled and diced into 2.5cm cubes
Dairy and Seasoning
- 60 ml heavy cream, warmed gently
- 50 g unsalted butter, cut into small cubes, room temperature
- 5 g fine sea salt
- 2 g ground white pepper
Nutrition (per serving)
Nutrition is estimated per serving. Nutrients without complete source data are omitted.
Full nutrition
- Calories
- 255 kcal
- Protein
- 4 g
- Carbohydrates
- 26 g
- Fat
- 16 g
- Fiber
- 6 g
- Sugar
- 5 g
- Sodium
- 583 mg
- Saturated Fat
- 10 g
- Trans Fat
- 0 g
- Monounsaturated Fat
- 4 g
- Polyunsaturated Fat
- 1 g
- Cholesterol
- 44 mg
- Potassium
- 884 mg
- Calcium
- 80 mg
- Iron
- 1.5 mg
- Magnesium
- 57 mg
- Phosphorus
- 167 mg
- Zinc
- 0.5 mg
- Vitamin A
- 147 mcg
- Vitamin C
- 34 mg
- Vitamin D
- 0.2 mcg
- Vitamin E
- 0.4 mg
- Vitamin K
- 1 mcg
- Vitamin B6
- 0.1 mg
- Vitamin B12
- 0.1 mcg
- Thiamin
- 0.03 mg
- Riboflavin
- 0.05 mg
- Niacin
- 0.2 mg
- Folate
- 9 mcg
- Water
- 57 g
Sources: Aggregated Public Data, USDA FoodData Central
Method
Peel the potato, celery root, and turnip. Cut all vegetables into uniform 2.5-centimeter cubes to ensure they cook at the same rate.
Place the diced vegetables in a large pot and cover them completely with cold water. Add a generous pinch of salt. Bring the water to a boil over high heat, then reduce the heat to maintain a steady simmer. Cook for 20 to 25 minutes.
Drain the vegetables thoroughly in a colander. Return the drained vegetables to the hot, empty pot off the heat. Let them sit uncovered for 2 to 3 minutes, tossing occasionally, to allow excess surface moisture to steam off and evaporate.
Pass the hot vegetables through a potato ricer directly back into the warm pot. Alternatively, mash them thoroughly with a potato masher until no large lumps remain.
Add the warmed heavy cream, room temperature butter, salt, and white pepper to the pureed vegetables. Fold the mixture gently with a spatula until the butter is completely melted and the ingredients are fully incorporated into a smooth, velvety puree. Serve immediately.
Chef's Notes
- Drying the vegetables after boiling is a vital professional step. Water is the enemy of a rich puree; evaporating it ensures the vegetables absorb the cream and butter fully.
- White pepper is preferred over black pepper in light-colored purees purely for aesthetic reasons, providing gentle heat without leaving dark specks throughout the dish.
- Warming the cream and ensuring the butter is at room temperature prevents the hot vegetables from seizing and cooling down too rapidly, which helps maintain a smooth emulsion.
- Celery root can sometimes harbor dirt in its deep crevices. Be aggressive when peeling, using a chef knife rather than a standard peeler to remove the tough, fibrous exterior completely.
Storage
Refrigerator: 4 days — Store in an airtight container. Press a piece of plastic wrap directly on the surface to prevent a skin from forming.
Freezer: 1 month — Freezing may cause slight separation or graininess. Thaw overnight and reheat gently while whisking vigorously.
Reheating: Reheat gently on the stovetop over low heat, stirring constantly. Add a splash of warm cream or milk to restore the silky texture if it appears too thick.
Troubleshooting
The puree is watery or thin.
Cause: The vegetables retained too much cooking water after being drained.
Fix: Return the puree to the stove over very low heat. Stir continuously with a wooden spoon for 3 to 5 minutes to cook off the excess moisture.
Prevention: Allow the drained vegetables to steam in the hot pot for a few minutes before mashing to evaporate excess moisture.
The puree has a gluey or gummy texture.
Cause: The potato starches were overworked, likely from using a blender or food processor, or from excessive stirring.
Fix: Cannot be fixed. A gummy puree cannot be reversed, though spreading it in a baking dish, topping with cheese, and baking as a gratin can make the texture less noticeable.
Prevention: Always mash manually with a ricer, food mill, or hand masher, and fold in dairy gently.
Cultural Context
The classic French technique of creating purees from hardy winter root vegetables transforms humble, inexpensive ingredients into elegant, silky side dishes. Often served alongside roasted meats or rich braises, this dish highlights the earthy sweetness of celeriac and turnip, beautifully balanced by the familiar starchy comfort of the potato.
