Slow-Cooked Chicken with Old-Fashioned Mustard – Tender & Flavorful

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Sophie Miller

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Welcome to the Cozy World of Slow-Cooked Creamy Mustard Chicken!

Hey there! If you’re anything like me, you adore a dish that feels comforting, yet fancy enough to impress your loved ones without too much fuss. This slow-cooked creamy mustard chicken recipe is one of my absolute go-tos. It’s slow-roasted to tender, juicy perfection with a rich, tangy sauce that will have you wanting seconds (and maybe even thirds!). I love how the creamy mustard sauce pairs so beautifully with the tender chicken—plus, the rosemary adds that lovely, fresh aroma that fills your kitchen with warmth.

The Joy of Slow Cooking Chicken

Slow cooking the chicken at a low temperature does wonders—it keeps the meat super tender and juicy, and the skin becomes beautifully golden when you finish it off under the broiler. Plus, the sauce develops a deep richness from the garlic, mustard, and cream, making it feel like a gourmet meal that’s surprisingly easy to make.

Nutritional Benefits: A Treat That’s Also Nourishing

This recipe is not just about comfort food, it’s also packed with goodness. Chicken is a fantastic source of lean protein, which helps keep you full and supports muscle health. Using whole grain mustard adds a little zing and contains antioxidants and seed oils that can have heart-healthy benefits. And if you choose olive oil instead of butter, you’re adding heart-friendly fats that support overall wellness. Pair it with roasted veggies or a fresh salad, and you have a balanced, satisfying meal that feels indulgent yet wholesome.

Step-by-Step Slow-Cooked Creamy Mustard Chicken Recipe

Ingredients

  • 1 whole chicken (about 3-4 lbs), spatchcocked
  • 3 tablespoons old-fashioned whole grain mustard
  • 1 cup heavy cream or crème fraîche
  • 1 cup chicken broth or dry white wine
  • 3 tablespoons butter or olive oil
  • 3-4 garlic cloves, minced
  • 1 small onion or 2 shallots, finely chopped (optional)
  • Fresh rosemary sprigs (plus extra for garnish)
  • Salt and freshly ground black pepper, to taste
  • Optional: 1 teaspoon paprika or cayenne pepper for color and mild heat

Instructions

  1. Preheat your oven to 300°F (150°C).
  2. Prepare the chicken: remove the backbone and flatten it by spatchcocking. Pat the chicken dry with paper towels.
  3. Season the chicken generously with salt, pepper, and if you want, paprika or cayenne for a little warmth and color.
  4. Heat butter or olive oil in a large oven-safe skillet or Dutch oven over medium-high heat.
  5. Place the chicken skin-side down in the pan and sear until golden brown and crispy, about 6-8 minutes. Flip and brown the other side for 4-5 minutes. Then remove chicken and set aside.
  6. Turn the heat to medium, add minced garlic and chopped onion or shallots to the pan. Sauté until fragrant and translucent—about 3-4 minutes.
  7. Deglaze the pan with chicken broth or white wine, scraping up all those flavorful brown bits stuck on the bottom. Let it reduce slightly for 2-3 minutes.
  8. Mix in the whole grain mustard and heavy cream. Stir until the sauce is smooth and creamy.
  9. Add a couple of fresh rosemary sprigs, and season the sauce with salt and pepper to taste.
  10. Return the chicken to the pan, skin side up, nestling it gently into the creamy sauce. Spoon some sauce over the top.
  11. Cover the pan with a lid or foil and transfer it to the oven.
  12. Slow cook the chicken for 1.5 to 2 hours, or until it’s tender and the internal temperature reaches 165°F (74°C).
  13. For extra crispy skin, remove the lid and place the chicken under the broiler for 2-3 minutes. Keep a close eye so it doesn’t burn!
  14. Take the pan out of the oven, discard the rosemary sprigs used in cooking, and garnish with fresh rosemary.
  15. Serve hot, spooning that delicious creamy mustard sauce over the chicken. It’s perfect with roasted veggies or some creamy mashed potatoes.

Helpful Tips for the Best Creamy Mustard Chicken

  • Spatchcocking Tip: If you’re new to spatchcocking, don’t worry! Use a sharp kitchen shears to cut along both sides of the backbone and press the chicken flat. It helps the chicken cook more evenly and quickly.
  • Make Ahead: You can prep the chicken and sauce a few hours ahead. Just cover and refrigerate until ready to cook.
  • Sauce Variations: If you want a lighter sauce, swap cream for crème fraîche or half-and-half for a tangy or lighter version.
  • Serving Suggestion: The sauce makes great leftovers too—use it as a dip for bread or spoon over steamed veggies.
  • Storage: Store leftovers in an airtight container in the fridge for up to 3 days. Reheat gently on the stove or in the oven.

Equipment Needed

To make this dish, you’ll want to have:

  • A good pair of kitchen shears (for spatchcocking the chicken)
  • A large oven-safe skillet or Dutch oven
  • A spatula or tongs (to turn the chicken)
  • Measuring spoons and cups
  • A sharp knife and cutting board
  • A meat thermometer (to check for doneness)

Frequently Asked Questions

  1. Can I use bone-in chicken thighs instead of a whole chicken? Absolutely! Just adjust cooking time since thighs may cook faster or slower depending on size. Use the thermometer to ensure they reach 165°F (74°C).
  2. What can I use if I don’t have heavy cream? Crème fraîche or half-and-half works nicely. You can also add a bit of flour to milk to thicken the sauce.
  3. Is spatchcocking necessary? It helps the chicken cook evenly and faster, but you can roast a whole chicken whole—it’ll just take longer.
  4. Can I prepare this recipe on the stovetop only? You can simmer the chicken gently in the sauce with a lid on but finishing in the oven helps tenderize the meat and develop flavors better.
  5. Can I add vegetables to the pan? Yes! Roasted carrots, potatoes, or mushrooms added early will absorb flavors and make a great one-pan meal.

Let’s Get Cooking!

I hope you give this slow-cooked creamy mustard chicken a try soon—it’s truly one of my favorite comfort dishes that feels both special and approachable. If you do make it, I’d love to hear how it turns out and see your photos! Be sure to share your recreations and tag me on Pinterest where I share more recipes and cooking tips. Happy cooking, and here’s to many delicious meals ahead!

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