French Onion Chicken with Roasted Carrots & Mashed Potatoes

Authentic American French Onion Chicken with Roasted Carrots & Mashed Potatoes — a delicious chicken dish with 12 ingredients. Follow our detailed step-by-step instructions for the perfect result.

Hard
Updated March 14, 2026

20

Prep Time (min)

30

Cook Time (min)

4

servings

430

Calories/serving

Hard

Difficulty

French Onion Chicken with Roasted Carrots & Mashed Potatoes

Ingredients

Servings:
4
  • 2 Chicken Breasts
  • 12 ounces Carrots
  • 5 Potatoes
  • 1 Onion
  • 1 Beef Stock
  • 1 cup Mozzarella
  • 2 tbsp Sour Cream
  • Butter
  • Sugar
  • Vegetable Oil
  • Salt
  • Pepper

Instructions

6 steps · ~98 minutes total

  1. Step 1

    Preheat oven to 425 degrees. Wash and dry all produce. Trim, peel, and cut carrots on a diagonal into ¼-inch-thick pieces. Dice potatoes into ½-inch pieces. Halve, peel, and thinly slice onion.

    25 minutes
    Keep your fingers curled under (claw grip) for safety when cutting.
  2. Step 2

    Toss carrots on a baking sheet with a drizzle of oil, salt, and pepper. Roast until browned and tender, 15-20 minutes.

    25 minutes
    Taste as you go and adjust seasoning gradually — you can always add more but can't take it away.
  3. Step 3

    Meanwhile, place potatoes in a medium pot with enough salted water to cover by 2 inches. Bring to a boil and cook until tender, 12-15 minutes. Drain and return potatoes to pot; cover to keep warm.

    10 minutes
    Use a large pot to prevent boiling over. Add salt to the water for extra flavor.
  4. Step 4

    While potatoes cook, heat a drizzle of oil in a large pan over medium-high heat. Add onion and cook, stirring occasionally, until lightly browned and softened, 8-10 minutes. Sprinkle with 1 tsp sugar (2 tsp for 4 servings). Stir in stock concentrate and 2 TBSP water (¼ cup for 4); season with salt and pepper. Cook until jammy, 2-3 minutes more. Turn off heat; transfer to a small bowl. Wash out pan.

    8 minutes
    Taste as you go and adjust seasoning gradually — you can always add more but can't take it away.
  5. Step 5

    Pat chicken dry with paper towels; season all over with salt and pepper. Heat a drizzle of oil in pan used for onion over medium-high heat. Add chicken and cook until browned and cooked through, 5-6 minutes per side. In the last 1-2 minutes of cooking, top with caramelized onion and cheese. Cover pan until cheese melts. (If your pan doesn’t have a lid, cover with a baking sheet!)

    5 minutes
    Taste as you go and adjust seasoning gradually — you can always add more but can't take it away.
  6. Step 6

    Heat pot with drained potatoes over low heat; mash with sour cream, 2 TBSP butter (4 TBSP for 4 servings), salt, pepper, and a splash of water (or milk, for extra richness) until smooth. Divide chicken, roasted carrots, and mashed potatoes between plates.

    25 minutes
    Taste as you go and adjust seasoning gradually — you can always add more but can't take it away.

💡 Tips & Tricks

This American recipe for French Onion Chicken with Roasted Carrots & Mashed Potatoes is best served fresh. Adjust seasoning to your taste.

🔄 Variations

• Protein swap: Try substituting the main protein with chicken, tofu, or shrimp for a different take on this dish. • Spice level: Adjust the heat to your preference — add more chili for extra kick, or reduce it for a milder version. • Vegetarian: Replace meat with mushrooms, chickpeas, or your favorite plant-based protein. • Fusion twist: Combine elements of American cuisine with your local favorites for a creative fusion dish.

Storage & Reheating

❄️

Refrigerator

Up to 3 days in an airtight container

🧊

Freezer

Up to 2 months — thaw overnight in fridge

🔥

Reheat in a skillet or microwave until heated through.

What to Serve With

Complete your american meal with these perfect pairings:

🍽️Coleslaw
🍽️French fries or baked potatoes
🍽️Corn on the cob

About This Dish

French Onion Chicken with Roasted Carrots & Mashed Potatoes is a beloved dish from American cuisine, originating in United States. With a total preparation time of about 50 minutes, it makes for a satisfying weeknight dinner.

American cuisine is a melting pot of flavors and traditions from around the world, shaped by the diverse cultures that make up the nation. From hearty comfort food to innovative modern dishes.

This recipe is rated hard difficulty and uses 12 ingredients. Experienced cooks will appreciate the technique involved.

Frequently Asked Questions

French Onion Chicken is a flavorful dish that combines tender chicken breasts topped with caramelized onions and melted cheese, inspired by the classic French onion soup.

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Nutrition Facts

4 serving(s) per recipe

Serving size1 serving
Calories430kcal
Total Fat19g
Sodium567mg
Total Carbohydrates47g
Dietary Fiber3g
Protein52g

* Percent Daily Values are based on a 2,000 calorie diet. Values are approximate and may vary based on ingredients used.

Recipe Details

CuisineAmerican
CategoryDinner
CountryUnited States