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Whole Roast Chicken With Potatoes and Leeks

March 7, 2025 / By Holly Erickson & Natalie Mortimer

Cooked in a cast-iron skillet, this simple whole roast chicken recipe with leeks and potatoes is a rich and elegant one-pan dinner that’s a low-lift meal that’s dressed to impress.

A whole roast chicken paired with crispy potatoes and tender leeks, golden and perfectly roasted for a comforting meal.
Photography by Gayle McLeod

A whole chicken, lots of grainy mustard, a good glug of wine, fresh leeks and garlic — this rustic, whole roast chicken recipe just screams French country cooking at its most elegant and most simple. First, you’ll rub a beautiful whole chicken all over with a mustard-and-garlic sauce, and yes, it will flavor the skin a bit. But, it’ll also drip off the whole chicken as it roasts, and mingle in the pan with pan juices and flavor the potatoes and leeks that are nestled underneath. As the chicken rests, a little cold butter stirred into the leeks and potatoes will magically make everything creamy and gorgeous — you can serve them all up as-is (leeks, potatoes and chicken count as dinner for sure) or you can whip up a quick salad on the side. If you want an even simpler whole chicken recipe, try our ultra-simple Whole Roast Chicken, Spatchcocked Grilled Chicken or our super basic Skillet-Roasted Chicken with Cabbage

Ingredients for Roasted Chicken with Leeks, Potatoes, and Tarragon Mustard Sauce - a complete one-pan dinner recipe

Key Ingredients

For the chicken: 

  • 1 whole chicken: We suggest looking for a 4-5 pound chicken, and don’t assume that bigger is better. Ina Garten famously argued that smaller is better (within reason) when it comes to making roast chicken, because younger chickens are more tender and because if it’s smaller, it’ll cook a bit more evenly.
  • Leeks: Always give leeks a really good rinse after you chop them — they can get sneaky bits of grit stuck between their leaves.
  • Lemons: A little lightness amidst all those rich and roasty flavors, this recipe is all about a perfect little dance happening between classic flavors.
  • Wine: Use a good, dry white wine that you’d be happy to drink because after all, you’ll probably want to drink a glass of white wine with your roast chicken feast!
  • New potatoes: Look for small, waxy potatoes like baby Yukon golds. They’re so buttery and perfect with this dish, and they cook to perfection in the skillet. 

For the mustard sauce: 

  • Mustard: Whole grain mustard is one of our favorite ingredients for making a dish feel just a little fancy. Bursting with flavor and texture, it’s at the heart of what makes this recipe work.
  • Olive oil: We like extra virgin olive oil best and reach for it ALL the time, but you could use regular olive oil here in a pinch.
  • Cider vinegar: with lots of butter, rich chicken drippings, and sweet leeks, this recipe needs the sharpness of mustard and vinegar to balance it all out.
  • Brown sugar: Either light or dark brown sugar is fine — you just want a little brown sugar also brings some balance, and emphasizes the natural sweetness of the leeks. If you really fear sugar, it’s OK to skip it in a pinch.
  • Fresh garlic: Who even makes roast chicken without garlic? We would never.  
whole-grain mustard, olive oil, apple cider vinegar, brown sugar, and minced garlic being combined in a bowl
whole-grain mustard, olive oil, apple cider vinegar, brown sugar, and minced garlic being brushed on a whole chicken
leeks, lemon slices, olive oil and wine layered on the bottom of a pan
a whole chicken covered in spices on top of leeks and lemon slices and surrounded with potatoes in a pan

How To Make Roast Chicken 

  1. Put the leeks, garlic, olive oil and wine in a large cast-iron skillet or braiser. Top them with a layer of lemon slices.
  2. Next comes the whole chicken! You don’t have to truss it, but many people believe that trussing the chicken — tying the legs together with kitchen string and tucking the wing tips under the body of the chicken — helps it cook more evenly. If you want it trussed and don’t want to mess around with it yourself, try asking your butcher to truss it for you.
  3. Make the mustard sauce and rub it all over the chicken.
  4. Nestle the potatoes (dressed with oil and salt) all around the chicken.
  5. Roast the chicken! When it’s done…
  6. Lift the chicken out of the pan and on to a cutting board so it can rest for about 10 minutes. This rest helps seal in the juices and ensures a super juicy, moist bird.
  7. Stir the tarragon and cold butter into the leeks and potatoes until the butter is melted. Serve the chicken drizzled with the pan sauce.
tarragon and butter being stirred into a pot with cooked potatoes, leeks and lemon slices
A whole roast chicken paired with crispy potatoes and tender leeks, golden and perfectly roasted for a comforting meal.

How Long To Roast

How long it takes your chicken to roast depends mostly on the size of your chicken. At 375°F, about 15 minutes per pound is the rule for roast chicken and we generally abide by it. But, an overcooked chicken is a dry chicken, so to avoid that, we suggest that you start checking for doneness about 20 minutes before your timer tells you the chicken is done. The USDA suggests checking the internal temperature of your roast chicken in the innermost part of the thigh and wing and the thickest part of the breast to confirm doneness — when you see 165 °F on your meat thermometer, get that chicken out of the oven. 

A whole roast chicken paired with crispy potatoes and tender leeks, golden and perfectly roasted for a comforting meal.
Tender segments of whole roast chicken served alongside crispy potatoes and caramelized leeks, a cozy and delicious dish.

Serving Suggestions

With the saucy potatoes and leeks, this is nearly a one-pan dinner. For close friends and family, you could probably get away with just serving a big crusty loaf of bread on the side and calling it a day. However, for company or a bigger crowd, serve it with: 

Tender segments of whole roast chicken served alongside crispy potatoes and caramelized leeks, a cozy and delicious dish.

How’d They Like It? 

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Whole Roast Chicken With Potatoes and Leeks Recipe

  • Serves:  6
  • Prep Time:  15 min
  • Cook Time:  1 hr 30 min
  • Calories:  351

Ingredients

  • 3 tablespoons whole-grain mustard
  • 3 tablespoons extra-virgin olive oil
  • 1 tablespoon apple cider vinegar
  • 2 teaspoons brown sugar
  • 6 cloves garlic, 2 cloves minced and 4 cloves thinly sliced
  • 1 (4-to 5-pound) whole chicken
  • 1 tablespoon plus 1 teaspoon kosher salt
  • ¼ teaspoon freshly cracked black pepper, plus more for serving
  • 3 large leeks, trimmed and thinly sliced (about 3 cups)
  • 2 lemons, thinly sliced
  • 1 cup white wine
  • 1 pound smallish new potatoes or petite gold
  • 1 tablespoon chopped fresh tarragon, plus more for serving
  • 4 tablespoons salted butter, cold

Method

  1. Preheat the oven to 375°F with a rack in the center position.

    Ingredients for Roasted Chicken with Leeks, Potatoes, and Tarragon Mustard Sauce - a complete one-pan dinner recipe
  2. In a small bowl, stir together the whole-grain mustard, 1 tablespoon of the olive oil, apple cider vinegar, brown sugar, and minced garlic. Sprinkle the chicken all over with the salt and pepper. Rub the chicken all over with the mustard mixture.

    whole-grain mustard, olive oil, apple cider vinegar, brown sugar, and minced garlic being brushed on a whole chicken
  3. Arrange the leeks and sliced garlic in the bottom of a large cast-iron skillet or braiser. Drizzle with 1 tablespoon of the olive oil, top with the lemon slices, and pour in the wine. Set the chicken, breast side up, on top of the bed of leeks and lemons. If desired, tie the legs together with kitchen string and tuck the wing tips under the body of the chicken. 

    leeks, lemon slices, olive oil and wine layered on the bottom of a pan
  4. In a large bowl, toss the potatoes with the remaining 1 tablespoon of olive oil and remaining 1 teaspoon of salt. Arrange the potatoes around the chicken. 

    a whole chicken covered in spices on top of leeks and lemon slices and surrounded with potatoes in a pan
  5. Roast the chicken for 15 minutes per pound. Begin checking for doneness when 20 minutes remain (see Note). Transfer the chicken to a cutting board and let rest for 10 minutes before carving. 

    A whole roast chicken paired with crispy potatoes and tender leeks, golden and perfectly roasted for a comforting meal.
  6. Stir the tarragon and cold butter into the leeks and potatoes until the butter is melted. Serve the chicken drizzled with the pan sauce.

    Tender segments of whole roast chicken served alongside crispy potatoes and caramelized leeks, a cozy and delicious dish.

Notes

As a good rule of thumb, chickens roast at 375°F for 15 minutes per pound. If your bird is bigger or smaller than what a recipe calls for, you can just do the math! A chicken is always done cooking when the internal temperature taken at the thickest part of the thigh and breast reaches 165°F on an instant-read thermometer, and the juices run clear. 

Nutrition Info

  • Per Serving
  • Amount
  • Calories 351
  • Protein 21 g
  • Carbohydrates 11 g
  • Total Fat 23 g
  • Dietary Fiber 1 g
  • Cholesterol 105 mg
  • Sodium 445 mg
  • Total Sugars 2 g

Whole Roast Chicken With Potatoes and Leeks

Questions & Reviews

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  • Ashley

    This meal really impressed my in laws but was actually not hard to pull off at all! We loved it, thank you.

    So glad you all loved it, thanks Ashley!