Slow-Cooker Chicken Breasts With Creamy Mustard-Leek Sauce

Slow-Cooker Chicken Breasts With Creamy Mustard-Leek Sauce

recipe image

Slow-Cooker Chicken Breasts With Creamy Mustard-Leek Sauce

Photo by Ty Mecham
  • Prep time
    20 minutes
  • Cook time
    2 hours 45 minutes
  • Serves
    2 to 4 people
Author Notes

An editor at Food52 asked me to develop a recipe for chicken breasts prepared in a slow cooker. I was initially concerned that the lean meat would dry out. But this recipe produces tender, savory chicken that’s also marinated overnight, which helps impart flavor. The mustard-leek sauce is rich and flavorful, with a nice tinge of acidity from the mustard. It’s based on classic French preparations of rabbit in mustard sauce. —Josh Cohen

  • Test Kitchen-Approved
Ingredients
  • For the Marinade

  • 1/3 cup

    mayonnaise


  • 2 tablespoons

    cider vinegar


  • 1/2 teaspoon

    salt, plus more for the slow cooker


  • 1 tablespoon

    fresh rosemary, finely minced


  • 1 tablespoon

    fresh sage, finely minced


  • 2

    boneless, skinless chicken breasts

  • For the Slow Cooker

  • 1

    shallot, finely minced


  • 1

    leek, trimmed and cleaned, cut into thin half moons


  • 3/4 cup

    chicken stock


  • 1 tablespoon

    cornstarch


  • 1 tablespoon

    whole-grain mustard


  • 2 tablespoons

    dry white wine


  • 1/3 cup

    heavy cream


  • 12 ounces

    egg noodles


  • 3 tablespoons

    butter


  • 1 handful

    fresh chives, finely chopped

Directions
  1. To make the marinade, add all the marinade ingredients except the chicken to a mixing bowl. Stir to combine. Nestle the chicken in the marinade. Cover and store in the refrigerator overnight.
  2. Add the shallot and leek to the slow cooker, along with a pinch of salt. Add the chicken stock and cornstarch to the slow cooker, and stir to combine. Make sure the cornstarch is dissolved in the chicken stock with no lumps. Add the mustard, white wine, and heavy cream, stirring once more to combine everything.
  3. Add the marinated chicken to the slow cooker, discarding any excess marinade. If some marinade and herbs are clinging to the chicken when you add it to the slow cooker, that’s fine. Set the slow cooker to low, and cook for 2 1/2 hours. When about 2 hours have passed, boil water in a large pot and cook the egg noodles according to the directions on the package. Toss the cooked egg noodles with butter and set aside.
  4. After 2 1/2 hours, check to see if the chicken is fully cooked. If it’s less than 165°F at its thickest point, continue cooking. Check the chicken every 15 minutes until it’s fully cooked.
  5. When the chicken is fully cooked, transfer it to a cutting board and slice it into medallions. Taste the sauce in the slow cooker. Add more salt as needed.
  6. To serve, arrange some chicken atop a portion of egg noodles. Top with sauce. Garnish with chives.

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