Sheet Pan Mustard Rosemary Chicken with Root Vegetables

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

Juicy chicken thighs roasted with earthy root vegetables and a tangy mustard-rosemary glaze, perfect for weeknight dinners. This american-inspired sheet pan ready in about 55 minutes pairs chicken thighs, olive oil, Dijon mustard for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 420 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 15 min Cook: 40 min Serves 4 American cuisine 420 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat oven to 400°F. Pat 1.5 lbs chicken thighs dry with paper towels, then toss with 2 tbsp olive oil, 1 tbsp Dijon mustard, and 1 tbsp chopped fresh rosemary until evenly coated.
  2. Step 2: Cut 3 medium carrots and 2 medium parsnips into 1-inch chunks, and peel 4 shallots, halving them. Place vegetables on a parchment-lined sheet pan, then add 3 minced garlic cloves, 1 tsp salt, and 1/2 tsp black pepper. Toss to coat.
  3. Step 3: Arrange chicken thighs on top of vegetables, ensuring skin-side up. Roast for 35-40 minutes until chicken reaches 165°F internally and vegetables are tender and caramelized at the edges.
  4. Step 4: Let rest for 5 minutes before serving to allow juices to redistribute.

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Frequently asked questions

How long does Sheet Pan Mustard Rosemary Chicken with Root Vegetables take to make?

Total time is about 55 minutes (15 min prep + 40 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Sheet Pan Mustard Rosemary Chicken with Root Vegetables?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep chicken thighs from drying out.

Can I substitute ingredients in Sheet Pan Mustard Rosemary Chicken with Root Vegetables?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Sheet Pan Mustard Rosemary Chicken with Root Vegetables for a different number of people?

The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with Sheet Pan Mustard Rosemary Chicken with Root Vegetables?

American sheet pan like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

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