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Roasted Mustard Tarragon Chicken

This roasted mustard tarragon chicken is a sophisticated take on the classic Sunday roast, offering a vibrant alternative to traditional gravy. The combination of pungent Dijon mustard and anise-scented fresh tarragon creates a beautiful crust on the bird, while the light, creamy sauce adds a touch of indulgence without being overly heavy. It is a fragrant, savoury dish that fills the kitchen with a wonderful aroma as it roasts to golden perfection.

As a diabetes-friendly main course, this recipe focuses on high-quality protein and fresh herbs to deliver maximum flavour. Serving the chicken with the juices strained into a refined sauce ensures the meat stays succulent and tender. Pair it with steamed seasonal greens and small new potatoes for a balanced, nourishing meal that the whole family will enjoy.

Continue reading below

Ingredients for Roasted Mustard Tarragon Chicken

  • 1 chicken (about 1.6kg)

  • 1 bunch tarragon, divided

  • 80ml plus 1 tablespoon Dijon mustard, divided

  • 1 1/2 tablespoons plain flour

  • 300ml water

  • 60ml double cream

  • kitchen string

How to make Roasted Mustard Tarragon Chicken

Preheat oven to 218°C with rack in middle.

Pull off excess fat around cavities of chicken and discard, then rinse chicken and pat dry. Mix together 1 1/2 teaspoons salt and 1 teaspoon pepper and rub inside cavity. Chop enough tarragon to measure 1 1/2 tablespoons and set aside, then add remainder of bunch to cavity. Put chicken in a flameproof shallow roasting pan or gratin dish and rub all over with 80ml mustard. Tie legs together with string and roast until an instant-read thermometer inserted into fleshy part of a thigh (do not touch bone) registers 77°C, 45 minutes to 1 hour.

Carefully tilt chicken so juices from cavity run into roasting pan, then transfer chicken to a cutting board and let stand 10 minutes.

Pour off all but 2 tablespoons fat from pan. Whisk in flour, then cook over medium heat, whisking, 1 minute. Add water, whisking constantly and scraping up brown bits, and bring to a boil. Simmer sauce until slightly thickened, then whisk in cream, remaining tablespoon mustard, and salt and pepper to taste.

Strain sauce through a fine-mesh sieve into a bowl, discarding solids, then stir in reserved chopped tarragon. Serve chicken with sauce.

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.

  • 16 Jan 2026 | Originally published

    Authored by:

    UK recipe editors

    Peer reviewed by

    UK recipe editors
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