Easy Creamy Chicken Pesto Casserole Recipe

Lunch

March 29, 2026

The Ultimate Comfort Food: Creamy Pesto Chicken Casserole

When you’re craving something warm, cheesy, and incredibly satisfying, this Creamy Chicken Casserole is the answer. It’s a one-pan wonder that brings together tender chicken thighs, a luscious pesto cream sauce, and fresh vegetables, all baked under a glorious blanket of melted cheese. Perfect for a busy weeknight but elegant enough for guests, this dish is a guaranteed crowd-pleaser that will have everyone asking for seconds. Let’s get cooking!

Ingredients

• 2 lbs (900g) boneless, skinless chicken thighs
• 2 tbsp (30g) green pesto
• ⅔ lb (300g) cauliflower, cut into florets
• 4 oz (115g) cherry tomatoes, halved
• 7 oz (200g) shredded cheese (mozzarella or Italian blend)
• 3 tbsp (45g) butter
• 1¼ cups (300ml) heavy whipping cream
• 1 large leek, sliced
• ½ tbsp (7.5ml) fresh lemon juice
• Salt and freshly ground black pepper, to taste

Instructions

1. Preheat your oven to 400°F (200°C).
2. In a small bowl, whisk together the heavy cream, pesto, and lemon juice. Season generously with salt and pepper to create the sauce.
3. Pat the chicken thighs dry with a paper towel and season them on all sides with salt and pepper.
4. In a large oven-safe skillet, melt the butter over medium-high heat. Sear the chicken thighs for 2-3 minutes per side until they are lightly golden.
5. Pour the creamy pesto sauce over the chicken in the skillet. (If your skillet isn’t oven-safe, transfer the seared chicken to a baking dish before adding the sauce).
6. Scatter the cauliflower florets, sliced leek, and halved cherry tomatoes around the chicken.
7. Sprinkle the shredded cheese evenly over the entire dish.
8. Bake for 25-30 minutes, or until the chicken is cooked through and the cheese is melted, bubbly, and slightly golden.

Nutritional Information

• Approximate values per serving (assumes 6 servings)
• Calories: 655 kcal
• Protein: 45g
• Fat: 51g
• Net Carbs: 8g

Pro Tips

• for the Perfect Casserole
• For a crispier, golden-brown topping, switch the oven to broil for the last 2-3 minutes of cooking. Keep a close eye on it to prevent burning.
• Feel free to substitute broccoli for cauliflower or add a few handfuls of fresh spinach for extra nutrients. Wilt the spinach before adding it to the dish.
• This casserole can be assembled up to 24 hours in advance. Cover and refrigerate, then add 10-15 minutes to the baking time when you’re ready to cook.
• Don’t overcrowd the pan when searing the chicken. Work in batches if necessary to ensure each piece gets a beautiful golden crust.

FAQ

Q: Can I use chicken breast instead of thighs in this pesto chicken casserole
A: Yes, you can substitute boneless, skinless chicken breasts. Since they are leaner, be mindful of the cooking time to avoid drying them out. You may need to reduce the baking time slightly and ensure the chicken reaches an internal temperature of 165°F (74°C).

Q: Is this creamy pesto chicken casserole keto-friendly
A: Absolutely! With only 8g of net carbs per serving, this recipe is a fantastic option for a keto or low-carb diet. The main ingredients like chicken, heavy cream, cheese, and cauliflower are all keto-approved.

Q: Can I make this chicken casserole ahead of time
A: Yes, this casserole is perfect for meal prep. You can assemble the entire dish up to 24 hours in advance. Simply cover it and store it in the refrigerator. When you’re ready to bake, you may need to add 10-15 minutes to the total cooking time.

Q: What can I serve with this cheesy chicken casserole
A: This dish is a satisfying meal on its own, but it also pairs wonderfully with a simple green salad, steamed asparagus, or zucchini noodles. For those not following a low-carb diet, it’s also delicious served over pasta or with a side of crusty bread to soak up the sauce.

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