Creamy Pesto Chicken Pasta Casserole

Name: Creamy Pesto Chicken Pasta Bake
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Cuisine: Italian-American Fusion
Ingredients: – 10 oz rigatoni; – 1.5 lbs chicken tenderloins, diced; – 1.5 tablespoons Italian seasoning; – 1/3 cup prepared pesto; – 1.5 cups shredded mozzarella; – 1 cup shredded or grated Parmesan cheese; – 2 tablespoons unsalted butter; – 1 medium yellow onion, diced; – 4 garlic cloves, minced; – 2 teaspoons Cajun seasoning; – 1 teaspoon red pepper flakes (optional); – 3 cups whole milk; – 8 oz sun-dried tomatoes, oil drained; – 1.5 cups broccoli florets, cut to bite-sized pieces; – 2 cups fresh baby spinach; – Olive oil for cooking; – Salt and freshly ground pepper for seasoning

By:

Gabriella Brotherton

Published:

March 12, 2026

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Why You’ll Love This Creamy Pesto Chicken Pasta Bake

Imagine coming home after a long day and whipping up a creamy pesto chicken pasta bake that’s ready in under an hour, blending the best of Italian and Cajun flavors into one cozy dish. This recipe stands out because it’s simple to put together, using everyday ingredients like rigatoni, chicken, and fresh veggies for a meal that’s both hearty and healthy. You’ll appreciate how the pesto adds a burst of herby goodness, mixed with a creamy sauce that’s packed with nutrients from spinach and broccoli, making it a go-to for busy parents and food enthusiasts alike.

One of the main benefits is its ease of preparation. This creamy pesto chicken pasta bake comes together in just about 50 minutes, with most of the work done in a single skillet, which means less mess and minimal cleanup for your weeknight routine. It’s perfect for students or working professionals who need something quick yet satisfying without spending hours in the kitchen. By using ingredients like diced chicken tenderloins and prepared pesto, you can have a delicious dinner on the table that feels homemade but doesn’t require advanced cooking skills.

Health benefits make this dish a smart choice for diet-conscious individuals and families. It includes plenty of veggies such as broccoli and spinach, which provide vitamins and fiber, while the chicken adds lean protein to keep you full and energized. The creamy pesto pasta recipe also balances carbs from rigatoni with fats from cheese and pesto, creating a well-rounded meal that supports wellness without sacrificing taste. Plus, options like substituting whole milk with half-and-half can make it richer or lighter based on your needs.

Versatility allows you to adapt creamy pesto chicken pasta to different dietary preferences, such as using gluten-free pasta for those with restrictions, ensuring everyone at the table can enjoy it.
Distinctive flavor comes from the fusion of Cajun spices and Italian herbs, with sun-dried tomatoes adding a sweet, tangy twist that sets this baked pesto chicken pasta apart from ordinary recipes.

This pesto chicken pasta bake is ideal for community gatherings, as it serves a crowd and travels well, aligning with the heartwarming traditions of sharing food on your blog. Creamy pesto chicken casserole variations let you tweak it for potlucks or picnics, making it a favorite among home cooks and church groups.

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Essential Ingredients for Creamy Pesto Chicken Pasta Bake

Gathering the right ingredients is key to making a successful creamy pesto chicken pasta bake. Below, you’ll find a detailed list of everything needed, with precise measurements and explanations for each item. This helps you understand how each component contributes to the dish’s flavor and texture.

Main Ingredients

10 oz rigatoni (approximately three-quarters of a 1lb box) – This short pasta holds the creamy sauce well, providing a sturdy base that absorbs flavors without getting mushy.
1.5 lbs chicken tenderloins, diced (boneless chicken breasts or thighs can be substituted) – Offers tender, juicy protein that’s easy to cook and adds heartiness to the pesto pasta bake.
1.5 tablespoons Italian seasoning – Infuses the chicken with aromatic herbs, enhancing the Italian-inspired flavors in this creamy chicken pasta dish.
1/3 cup prepared pesto (store-bought or homemade) – Brings a fresh, herby punch that ties the Cajun and Italian elements together for a rich, flavorful sauce.
1.5 cups shredded mozzarella (preferably freshly shredded from the block) – Melts beautifully on top, creating a gooey, cheesy layer that makes this baked pesto chicken pasta irresistible.
1 cup shredded or grated Parmesan cheese (freshly grated recommended) – Adds a nutty, salty depth that complements the creamy sauce and helps bind the ingredients.
2 tablespoons unsalted butter – Provides a silky base for sautéing onions and garlic, enriching the overall creaminess of the pesto chicken pasta recipe.
1 medium yellow onion, diced (red onion or shallots can be alternatives) – Builds a flavorful foundation by adding sweetness and depth to the sauce in this creamy pesto pasta.
4 garlic cloves, minced – Offers a pungent aroma that elevates the dish, ensuring every bite of creamy pesto chicken casserole is full of savory notes.
2 teaspoons Cajun seasoning (homemade or store-bought) – Introduces a spicy kick that fuses with the Italian flavors, making this chicken pasta bake uniquely delicious.
1 teaspoon red pepper flakes (optional) – Adds extra heat for those who enjoy a bit of spice in their easy creamy pesto pasta bake.
3 cups whole milk (half and half or cream can replace milk for richer sauce) – Creates the creamy base that coats the pasta and veggies, with options for adjusting richness.
8 oz sun-dried tomatoes, oil drained – Bring a sweet, tangy contrast that brightens the flavors in this pesto chicken pasta casserole.
1.5 cups broccoli florets, cut to bite-sized pieces – Adds crunch and nutrients, making the dish more wholesome and balanced.
2 cups fresh baby spinach – Wilts into the sauce for added vitamins and a pop of color, enhancing the health aspects of creamy pesto chicken pasta.
Olive oil for cooking – Used for searing the chicken and sautéing, it helps achieve a golden finish without overpowering other flavors.
Salt and freshly ground pepper for seasoning – Essential for bringing out the tastes in every element of this baked pesto chicken pasta.

Special Dietary Options

For those with specific needs, here are some adjustments:

Vegan: Swap chicken for plant-based alternatives like tofu or chickpeas, use vegan pesto and cheeses, and replace milk with almond milk to keep it creamy while maintaining the pesto pasta bake’s structure.
Gluten-free: Opt for gluten-free rigatoni or another short pasta to enjoy this creamy pesto chicken pasta without issues.
Low-calorie: Use low-fat milk and reduce cheese amounts, focusing on loading up on veggies like broccoli and spinach for a lighter version of the recipe.

How to Prepare the Perfect Creamy Pesto Chicken Pasta Bake: Step-by-Step Guide

Getting started with this creamy pesto chicken pasta bake is straightforward and fun, perfect for home cooks looking for a reliable recipe. Begin by preparing your ingredients to make the process smooth and enjoyable. This section walks you through each step with clear instructions, timings, and tips for success.

First Step: Prepare the Chicken

Toss the 1.5 lbs diced chicken tenderloins with 1 tablespoon olive oil, 1.5 tablespoons Italian seasoning, 1 teaspoon salt, and freshly ground pepper. This step seasons the meat evenly, ensuring it’s flavorful throughout the creamy pesto chicken pasta bake. Let it sit for a few minutes while you heat your skillet, allowing the flavors to soak in.

Second Step: Cook the Pasta

Bring a large pot of salted water to a boil. Add the 10 oz rigatoni and cook to al dente, which takes about 8-10 minutes depending on the brand. For the best creamy pesto pasta, drain the pasta but reserve some cooking water to adjust the sauce later if needed, preventing it from becoming too thick.

Third Step: Sear the Chicken

In an oven-safe skillet over medium heat, cook the seasoned chicken in 2 tablespoons olive oil for 4-5 minutes per side until golden and cooked through. Reduce heat to low if it starts browning too quickly to keep the chicken tender. Once done, remove it from the skillet and set aside, which should take around 10 minutes total for this part of the creamy pesto chicken pasta recipe.

Fourth Step: Sauté the Aromatics

Using the same skillet on medium-low heat, melt 2 tablespoons unsalted butter. Add the diced medium yellow onion and sauté until translucent, about 2-3 minutes,Sauce then stir in the 4 minced garlic cloves and cook until fragrant, roughly 1 minute. This builds a flavorful base for your pesto chicken pasta casserole without overwhelming the other ingredients.

Fifth Step: Create the Sauce

Add 3 cups whole milk, 2 teaspoons Cajun seasoning, 1 teaspoon red pepper flakes if using, and salt and pepper to taste; stir well. Incorporate the 8 oz drained sun-dried tomatoes and 1.5 cups broccoli florets, then bring to a simmer and cook until the broccoli softens, about 5 minutes. For dietary adaptations, you can swap milk for half-and-half here to make it richer or lighter based on preferences.

Sixth Step: Combine Everything

Stir in the 2 cups fresh baby spinach until it wilts, which happens quickly in the hot sauce. Fold in the cooked rigatoni, seared chicken, and 1/3 cup pesto until everything is well combined, creating that signature creamy texture. If the sauce seems too thick, add a splash of reserved pasta water to help it coat the pasta perfectly in this baked pesto chicken pasta dish.

Final Step: Broil and Serve

Preheat your oven broiler. Top the skillet with 1.5 cups shredded mozzarella and 1 cup grated Parmesan cheese. Broil for 3-5 minutes until the cheese melts and browns slightly, keeping a close eye to avoid burning. Let it cool for a few minutes before serving your creamy pesto chicken pasta bake, which yields about 8 servings for family gatherings or potlucks. For added value, check out our Cajun chicken pasta recipe for more spicy inspirations.

Dietary Substitutions to Customize Your Creamy Pesto Chicken Pasta Bake

Protein and Main Component Alternatives

Swapping proteins can make this creamy pesto chicken pasta adaptable for various needs. For instance, use 1.5 lbs diced tofu or chickpeas instead of chicken for vegetarians, keeping the Italian seasoning for that familiar flavor. If you’re avoiding meat, Beyond Meat crumbles work well, ensuring the dish remains juicy and protein-packed for busy parents or diet-conscious folks.

This allows you to maintain the essence of the pesto chicken pasta bake while catering to preferences, like using turkey for a leaner option. For a full 8 servings, these changes help keep the meal balanced and easy to prepare in about 50 minutes.

Creamy Pesto Chicken Pasta Casserole

Why You’ll Love This Creamy Pesto Chicken Pasta Bake