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Pot-Roasted Celery Root with Olives and Buttermilk

This elegant vegetarian dish celebrates the humble celeriac by transforming it into a tender, buttery centrepiece. Pot-roasting the whole roots allows the earthy, nutty flavours to intensify as they soften in a fragrant bath of woody herbs and foaming butter. The optional addition of coffee beans provides a subtle, savoury depth that perfectly complements the natural sweetness of the vegetable, while the golden exterior offers a pleasing contrast to the creamy flesh within.

Served with a delicate buttermilk sauce and punchy oil-cured olives, this recipe is a sophisticated choice for a weekend lunch or a meat-free dinner party. The tangy buttermilk provides a bright acidity that cuts through the richness of the roast, ensuring the dish feels light yet satisfying. Pair it with a crisp green salad or some crusty sourdough to soak up every drop of the luxurious juices.

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Ingredients for Pot-Roasted Celery Root with Olives and Buttermilk

  • 45ml plus 2 teaspoons extra-virgin olive oil plus more for drizzling

  • 6 small celery roots (celeriac

  • each about 110g ), unpeeled, trimmed with some stem still attached

  • 110g (1 stick) unsalted butter, cut into 1" cubes

  • Kosher salt

  • 12 sprigs thyme

  • 6 sprigs rosemary

  • 6 sprigs sage

  • 1 tablespoon coffee beans (optional)

  • 240ml buttermilk

  • 1/2 lemon

  • 60ml oil-cured black olives, pitted, quartered lengthwise

Heat 45ml oil in a large heavy pot over medium heat. Add celery roots and cook, turning frequently, until golden, 8-10 minutes. Add butter and a large pinch of salt. When butter begins to foam, reduce heat to medium-low. Add herb sprigs, coffee beans, if using, and 350ml water. Cover and gently cook, adding more water by tablespoonfuls if pan is dry, until celery roots are very tender, about 1 hour.

Remove herbs and coffee beans (if using) from pot and discard. Baste celery roots with buttery juices in pot. Remove from heat. Transfer celery roots to a cutting board, slice in half through stems, and place 2 halves on each plate.

Meanwhile, very gently warm buttermilk in a small saucepan over low heat (it will break if warmed too much). Squeeze in a few drops of lemon juice and add remaining 2 teaspoons oil and a pinch of salt to make a loose sauce. Spoon sauce around celery roots on plates. Garnish with olives, drizzle with oil, and squeeze a few more drops of lemon juice over each.

Disclaimer

While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.

Article history

The information on this page is peer reviewed by qualified clinicians.

  • 28 Jan 2026 | Originally published

    Authored by:

    UK recipe editors

    Peer reviewed by

    UK recipe editors
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