Pesto Chicken Chili Mac

My neighbor showed up one Tuesday with a container of homemade basil pesto, apologizing that her garden had gone wild again. I stood there staring at it, thinking about the chili mac I'd made a dozen times, and suddenly wondered what would happen if I threw Italian flavors into that familiar comfort zone. The result was this Pesto Chicken Chili Mac—a dish that somehow manages to feel both cozy and unexpectedly vibrant, like discovering a secret room in a house you thought you knew.

The first time I made this for company, my sister took one bite and immediately asked if I'd quit my job to become a chef. I laughed—but then she got serious and said she'd never had chili mac that tasted Mediterranean before, like it had been to Italy and came back with stories. Watching people go quiet while eating, just savoring each spoonful, made me realize this wasn't just fusion food—it was something that genuinely transported people somewhere unexpected.

Ingredients

• Elbow macaroni or small pasta shells (340 g / 12 oz): Small shapes cradle the sauce better than large ones, and al dente pasta keeps everything from turning mushy when the cheese melts in.
• Boneless, skinless chicken breast, diced (450 g / 1 lb): Cut your pieces into roughly bite-sized chunks so they cook evenly and don't get lost in the sauce.
• Yellow onion, diced (1 medium): This is your aromatic foundation—don't skip it or rush the cooking, or you'll miss that sweet, mellow flavor.
• Garlic cloves, minced (3): Fresh garlic makes all the difference here; that pungent bite mellows into something almost sweet as it cooks.
• Red bell pepper, diced (1): The sweetness balances the sun-dried tomatoes and adds a textural contrast that keeps things interesting.
• Oil-packed sun-dried tomatoes, drained and chopped (120 g / ½ cup): These concentrated flavor bombs are why this dish tastes rich without being heavy—but drain them well or they'll make the sauce greasy.
• Canned diced tomatoes, undrained (400 g / 14 oz): The juice matters as much as the tomatoes themselves; it becomes part of your liquid base.
• Shredded mozzarella cheese (180 g / 1½ cups): Use a good quality mozzarella that actually melts smoothly instead of getting stringy and weird.
• Grated Parmesan cheese (60 g / ¼ cup): This adds a sharp, salty note that wakes up your palate after all that creamy richness.
• Prepared basil pesto (120 g / ½ cup): This is the heart of the whole dish—it's what makes chili mac suddenly feel Italian, so use pesto you actually like.
• Low-sodium chicken broth (720 ml / 3 cups): Low-sodium lets you control the salt and prevents the finished dish from tasting like the ocean.
• Olive oil (2 tbsp): This is your cooking medium, so use something you wouldn't be embarrassed to taste in a finished dish.
• Italian seasoning (1½ tsp): A shortcut that layers in dried herbs without having to buy five different bottles.
• Crushed red pepper flakes, optional (½ tsp): Add this if you want a gentle heat that doesn't overpower the delicate pesto flavors.
• Salt and freshly ground black pepper, to taste: Season as you go, not just at the end—it's the difference between good and memorable.

Instructions

Get your pasta going:

Bring a big pot of salted water to a rolling boil—it should taste like the sea. Add your pasta and cook until just al dente, meaning there's still a tiny bit of resistance when you bite it, then drain and set it aside.

Sear the chicken until it's golden:

Heat olive oil in a Dutch oven or deep skillet over medium-high heat until it shimmers slightly. Add your diced chicken with a pinch of salt and pepper, then let it sit undisturbed for a couple minutes so it develops a golden crust—this is where flavor lives.

Build your flavor base:

Push the chicken to the side, add your diced onion and red bell pepper to the pot, and let them cook down for about 4 minutes until they're soft and starting to release their sweetness. Toss in your minced garlic and cook for just another minute—you want it fragrant but not brown.

Layer in the Mediterranean flavors:

Stir in your sun-dried tomatoes, Italian seasoning, and red pepper flakes if you're using them. Cook everything together for a minute so the spices bloom and wake up.

Add your liquid base:

Pour in the canned diced tomatoes with all their juice, then add the chicken broth. Give everything a good stir and bring it to a gentle simmer—you're not looking for a rolling boil here.

Bring everything back together:

Return your cooked chicken to the pot along with your drained pasta. Stir in the pesto—and this is important—fold it in gently at first so you can see how the color changes and the aromatics bloom. Let everything simmer together for 3 to 4 minutes so the flavors get to know each other.

Make it creamy and rich:

Remove the pot from heat and add both cheeses, stirring gently until they've melted completely and created that silky, creamy sauce. Taste it now and adjust your salt and pepper—this is your moment to make it exactly what you want.

Serve while it's hot:

Ladle it into bowls and garnish with extra pesto or a shower of Parmesan if you're feeling fancy. The steam rising from the bowl is part of the experience.

Save

There was this one Saturday when I made this for my kids' teachers during an end-of-year potluck, honestly not expecting much—it was just something I'd thrown together that morning. One teacher came back to ask for the recipe, and then another, and by the end of the afternoon I was writing it out on the back of napkins like I was signing autographs. That moment made me realize comfort food doesn't have to be boring, and fusion doesn't have to feel pretentious.

Why This Dish Works

Chili mac is nostalgic and satisfying, but it can feel a little one-note if you're not careful. The moment you introduce pesto into the equation, everything shifts—suddenly you've got herbaceous brightness cutting through the richness of the cheese and cream. The sun-dried tomatoes add this concentrated, almost sweet depth that you don't get from regular canned tomatoes alone, while the mozzarella creates that pull-apart, comforting texture that makes people want to come back for another bite.

What to Serve Alongside

This dish is basically a complete meal on its own, but a crisp green salad with a simple lemon vinaigrette cuts through the richness in a way that feels refreshing. Garlic bread is the obvious choice, and it works beautifully—you're just doubling down on the Italian flavors. If you want something lighter, toasted crusty bread for soaking up the extra sauce is honestly all you need.

Smart Swaps and Variations

If you're short on time or don't feel like dealing with chicken, rotisserie chicken shredded right off the bone works just as well and actually tastes richer. A handful of fresh baby spinach stirred in during the last couple minutes adds color and a leafy brightness that feels almost elegant. You can also swap the mozzarella for a blend of mozzarella and fontina if you want something a bit more sophisticated, or go heavier on the Parmesan if you like a sharper, saltier finish.

• Make it vegetarian by swapping the chicken for chunky tofu or hearty mushrooms like cremini or porcini.
• For a spicier version, increase the red pepper flakes and add a pinch of cayenne to the spice mix.
• If you have fresh basil on hand, stir in a handful at the very end for a brightness that bottled pesto sometimes can't quite capture.

Save

This is the kind of dish that reminds you why cooking at home is worth the effort—it's creative without being complicated, and it tastes like you actually cared about making someone happy. Make it once and it becomes the thing people ask you to bring.

Recipe FAQs

→ Can I use rotisserie chicken instead of raw chicken breast?

Yes, rotisserie chicken works perfectly. Skip the initial chicken sauté step and add shredded rotisserie chicken when you return cooked chicken to the pot in step 6.

→ What pasta shapes work best for this dish?

Elbow macaroni or small pasta shells are ideal because their shapes hold the thick pesto-tomato sauce well. Other small shapes like fusilli or penne also work nicely.

→ Can I make this ahead of time?

This dish is best served immediately as the pasta absorbs liquid while standing. If making ahead, undercook the pasta slightly and add extra broth when reheating to restore creaminess.

→ Is there a nut-free pesto option?

Yes, use nut-free pesto or make your own by blending fresh basil, olive oil, Parmesan, garlic, and sunflower seeds or pumpkin seeds instead of pine nuts.

→ What vegetables can I add for more nutrition?

Baby spinach stirred in during the last few minutes wilts nicely. Zucchini, mushrooms, or diced eggplant added with the bell pepper also complement the Italian flavors.

→ Can I freeze leftovers?

Freezing is possible but the pasta texture may become softer. For best results, freeze without the cheese and add fresh mozzarella and Parmesan when reheating.