One-Pot Garlic Parmesan Chicken with Spinach and Mushrooms

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · Published 2026-05-11 · Updated 2026-05-11

A comforting one-pot meal featuring tender chicken breasts simmered with garlic, fresh spinach, and earthy mushrooms in a creamy Parmesan sauce. This american-inspired chicken ready in about 40 minutes pairs olive oil, salt, black pepper 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.

Ingredients

• 4 pieces (about 6 oz each) boneless skinless chicken breasts
• 2 tbsp olive oil
• 1 tsp salt
• 1/2 tsp black pepper
• 2 tbsp unsalted butter
• 4 cloves, minced garlic cloves
• 8 oz, sliced white mushrooms
• 4 cups baby spinach
• 2 tbsp all-purpose flour
• 1 1/2 cups chicken broth
• 1 cup half-and-half
• 3/4 cup grated Parmesan cheese
• 1/2 tsp dried thyme

Instructions

1. Step 1: Season 4 boneless skinless chicken breasts with 1 tsp salt and 1/2 tsp black pepper on both sides.
2. Step 2: Heat 2 tbsp olive oil in a large deep skillet over medium-high heat. Add the chicken breasts and sear for 5 minutes on each side, until golden brown and cooked through, then remove from the skillet and set aside.
3. Step 3: Reduce heat to medium and add 2 tbsp unsalted butter to the same skillet. Once melted, add 4 minced garlic cloves and sauté for 1 minute until fragrant.
4. Step 4: Add 8 oz sliced white mushrooms and cook for 5 minutes until they release their moisture and start to brown.
5. Step 5: Stir in 2 tbsp all-purpose flour and cook for 1 minute, stirring constantly, to form a roux.
6. Step 6: Slowly whisk in 1 1/2 cups chicken broth and 1 cup half-and-half, stirring until the sauce thickens and coats the back of a spoon, about 4-5 minutes.
7. Step 7: Add 4 cups baby spinach and 3/4 cup grated Parmesan cheese, stirring until the spinach wilts and the cheese melts.
8. Step 8: Return the chicken breasts to the skillet, sprinkle 1/2 tsp dried thyme over the top, cover, and simmer on low for 5 minutes to meld flavors and warm through.