Slow grilled mustard chicken is the kind of dinner that makes you look like a backyard pro without breaking a sweat. This bone-in chicken is seared over high heat, then finished low and slow on the grill, locking in every drop of juicy, tangy flavor. I made this for the first time after my mother-in-law shared the technique, and honestly, it changed how I grill chicken forever.
If you have been fighting dry, overcooked grilled chicken all summer, this recipe is your answer. The Dijon marinade does all the heavy lifting, and the low-and-slow method delivers the most tender results. I have made this at least five times in a row, which almost never happens in my kitchen. You’re going to love this one!
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Ingredients for Slow Grilled Mustard Chicken
I always keep Dijon mustard stocked specifically for this slow grilled mustard chicken. The combination of tangy mustard, Worcestershire, and a touch of molasses creates a marinade that is bold but incredibly balanced. Here is everything you will need:
- 2 to 3 lbs bone-in chicken pieces (thighs, breasts, or drumsticks) – I recommend bone-in for the juiciest results
- 1/2 cup Dijon mustard – my preference is a smooth, classic Dijon for best flavor
- 3 tbsp white or apple cider vinegar
- 4 tsp Worcestershire sauce
- 1/4 tsp dried thyme
- 2 tbsp light-flavored molasses (added to the sauce at the end)
Pro tip: In my experience, marinating overnight gives you noticeably deeper flavor compared to a quick 30-minute soak.
Step-by-Step Instructions
I recommend reading through all the steps before you fire up the grill. Timing the sear and the slow cook makes all the difference with this slow grilled mustard chicken.
Step 1: Pat chicken pieces completely dry with paper towels and trim any excess fat. This helps the marinade stick and the skin crisp up properly.
Step 2: Combine Dijon mustard, vinegar, Worcestershire sauce, and thyme in a large ziplock bag. Add the chicken, seal, and shake to coat evenly. Refrigerate for at least 4 hours or up to 24 hours. Drain the chicken before grilling but save the marinade.
Step 3: Preheat your grill to high heat. If using a gas grill, keep one burner off to create an indirect heat zone. If using charcoal, push coals to one side.
Step 4: Place chicken skin-side down over direct high heat. Close the lid and sear for 3 to 5 minutes until the skin is golden and has visible grill marks.
Step 5: Flip the chicken and move it to the indirect heat zone (the burner that is off). Reduce the active burner to medium-low, targeting 250 to 275 degrees F. Close the lid.
Step 6: Cook for 30 to 50 minutes depending on the thickness of your pieces. Brush with reserved marinade every 10 to 15 minutes. Chicken is done when a meat thermometer reads 165 degrees F at the thickest part.
Step 7: Optional but worth it: quickly sear the unseared side over direct high heat for 1 to 2 minutes before serving for extra caramelization.
Step 8: While chicken rests, pour remaining marinade into a small saucepan with 2 tbsp molasses. Bring to a boil, then reduce to a low simmer for 3 to 5 minutes until slightly thickened. Serve alongside the chicken.
What to Pair with Slow Grilled Mustard Chicken
This chicken pairs beautifully with sides that balance its bold, tangy flavor with something creamy, fresh, or hearty.
Garlic Roasted Vegetables: Roasted vegetables are the easiest complement here. The caramelized edges and savory garlic notes balance the mustard tang without competing with it.
Crispy Oven-Baked Sweet Potato Fries: The natural sweetness of sweet potato fries plays off the tangy Dijon marinade perfectly. A great option for kids and adults alike.
Lemon Garlic Butter Chicken Thighs with Green Beans: If you are feeding a crowd and want a second protein option, this dish rounds out the table with bright citrus and buttery green beans.
Mediterranean Chickpea Salad with Lemon Vinaigrette: A fresh, protein-rich salad that adds a light and vibrant contrast to the smoky grilled chicken. Great for summer entertaining.
Baked Garlic Parmesan Potato Wedges: Crispy, cheesy potato wedges are always a crowd-pleaser and hold up well next to the bold mustard sauce on the side.
Storage and Serving Tips
Store leftover slow grilled mustard chicken in an airtight container in the refrigerator for up to 4 days. Let the chicken cool fully before sealing to prevent sogginess. The mustard sauce stores separately in a small jar for up to 5 days.
To reheat, I recommend warming the chicken in a 325 degree F oven for 10 to 15 minutes rather than microwaving. This keeps the skin from turning rubbery and preserves the texture. A quick 1-minute sear on a hot skillet also works great for leftovers.
Pro tip: Leftover chicken works wonderfully shredded into wraps, grain bowls, or on top of a simple green salad the next day. The mustard flavor actually deepens overnight, making leftovers just as good as the first serving.
Conclusion
Slow grilled mustard chicken is one of those recipes you will keep coming back to all summer long. It is simple to prep, almost hands-off on the grill, and delivers restaurant-worthy results every single time. Whether you are cooking for family on a weeknight or hosting friends on the weekend, this one never disappoints. Give it a try this week and see for yourself!
Slow Grilled Mustard Chicken
Ingredients
Equipment
Method
- Pat chicken pieces completely dry with paper towels and trim any excess fat.
- Combine Dijon mustard, vinegar, Worcestershire sauce, and thyme in a large ziplock bag. Add chicken, seal, and shake to coat. Refrigerate for at least 4 hours or up to 24 hours. Drain chicken before grilling and reserve the marinade.
- Preheat grill to high heat. Set up one side for indirect heat by turning off one burner on a gas grill or pushing coals to one side on charcoal.
- Place chicken skin-side down over direct high heat. Close lid and sear for 3 to 5 minutes until skin is golden with visible grill marks.
- Flip chicken and move to the indirect heat zone. Reduce active burner to medium-low, targeting 250 to 275 degrees F. Close lid.
- Cook for 30 to 50 minutes depending on thickness, brushing with reserved marinade every 10 to 15 minutes. Chicken is done when internal temperature reaches 165 degrees F.
- Optional: Quickly sear the unseared side over direct high heat for 1 to 2 minutes before serving.
- Pour remaining marinade into a small saucepan with 2 tbsp molasses. Bring to a boil then reduce to low simmer for 3 to 5 minutes until slightly thickened. Serve alongside the chicken.
