One-Pot Creamy French Onion Chicken Pasta

By AislePrompt Editorial · Published 2026-05-23 · Updated 2026-05-23

A comforting one-pot pasta dish combining tender chicken, caramelized onions, and a creamy sauce infused with rich beef broth and melted cheese. This Australian-inspired pasta recipe, ready in about 55 minutes, pairs chicken breasts, yellow onions, olive oil for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 600 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.

Ingredients

• 2 pieces, diced into 1-inch cubes chicken breasts
• 2 medium, thinly sliced yellow onions
• 2 tbsp olive oil
• 3 cloves minced garlic
• 2 cups beef broth
• 1 cup whole milk milk
• 8 oz (about 2 cups) penne pasta
• 1 cup shredded mozzarella cheese
• 1 tbsp all-purpose flour
• 2 tbsp butter
• 1 tsp salt
• 1/2 tsp black pepper
• 1 tsp leaves, chopped fresh thyme

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Instructions

1. Step 1: Heat 2 tbsp olive oil in a large deep skillet over medium heat. Add 2 thinly sliced medium yellow onions and 1 tsp salt, cooking for 15 minutes, stirring occasionally, until onions are deep golden and caramelized.
2. Step 2: Push onions to the side and add 2 diced chicken breasts (1-inch cubes) to the skillet. Cook for 5-6 minutes until browned on all sides.
3. Step 3: Add 3 minced garlic cloves and 2 tbsp butter, stirring for 1 minute until fragrant.
4. Step 4: Sprinkle 1 tbsp all-purpose flour over the chicken and onions, stir well to coat and cook for 2 minutes to remove raw flour taste.
5. Step 5: Pour in 2 cups beef broth and 1 cup whole milk gradually while stirring to prevent lumps.
6. Step 6: Add 8 oz penne pasta, 1/2 tsp black pepper, and 1 tsp chopped fresh thyme. Bring to a boil, then reduce heat to medium-low and simmer uncovered for 12-15 minutes, stirring occasionally, until pasta is tender and sauce has thickened.
7. Step 7: Remove from heat and stir in 1 cup shredded mozzarella cheese until melted and creamy.
8. Step 8: Serve hot garnished with extra thyme if desired.