This oven baked 4-ingredients creamy Cajun pasta is exactly the kind of spicy comfort dish my cousin swears by on hectic weeknights. It leans on pantry-friendly shortcuts—jarred sauce, dried pasta, a Cajun seasoning blend, and a blanket of Parmesan—to deliver a rich, orange, restaurant-style casserole with almost no hands-on time. While Cajun flavors trace back to the cooking of French-speaking Acadians in Louisiana, this version is firmly in the homey, Midwestern “dump-and-bake” tradition: minimal prep, maximum payoff, and just one baking dish to wash.
Serve this creamy Cajun pasta straight from the hot casserole dish with a simple green salad dressed in a tangy vinaigrette to balance the richness. Garlic bread or a warm baguette is perfect for scooping up the extra sauce along the edges. If you’d like something lighter, pair it with steamed or roasted vegetables—broccoli, green beans, or asparagus all work nicely and stand up well to the spice and creaminess.
Oven Baked 4-Ingredients Creamy Cajun PastaServings: 4
Ingredients
12 oz dried penne pasta
24 oz jar creamy Cajun or Cajun-style Alfredo pasta sauce
2–3 tbsp Cajun seasoning blend, divided
1 1/2 cups grated Parmesan cheese, divided
Directions
Preheat your oven to 375°F (190°C). Lightly grease a 9x13-inch glass casserole dish so the pasta and cheese don’t stick.
Pour the dried penne pasta evenly into the bottom of the casserole dish. No need to boil it first; it will cook in the sauce.
In a medium bowl, whisk together the creamy Cajun pasta sauce and 2 tablespoons of the Cajun seasoning until smooth and well combined. Taste a small spoonful; if you like it spicier, whisk in up to 1 more tablespoon of Cajun seasoning.
Pour the seasoned sauce over the dry penne in the dish, using a spatula or spoon to stir and coat all the pasta so there are no dry pockets. Spread the pasta into an even layer, making sure most of it is submerged in sauce.
Sprinkle 1 cup of the grated Parmesan cheese evenly over the top of the sauced pasta. Reserve the remaining 1/2 cup of Parmesan for later.
Cover the casserole dish tightly with foil to trap steam, which will help the pasta cook through and keep the sauce creamy. Place the dish on the middle rack of the preheated oven.
Bake, covered, for 30–35 minutes, until the pasta is mostly tender when you poke a piece with a fork and the sauce is bubbling around the edges.
Carefully remove the foil (watch for hot steam) and sprinkle the remaining 1/2 cup Parmesan evenly over the top. Return the dish to the oven, uncovered.
Bake for another 10–15 minutes, until the cheese is melted, lightly golden in spots, and the sauce has thickened into a rich, orange, creamy coating around the penne.
Remove the casserole from the oven and let it rest for 5–10 minutes. This brief rest helps the sauce settle and cling to the pasta so you get that close-up, creamy, casserole-style texture when you scoop it out. Serve hot straight from the glass dish.
Variations & Tips
To keep this in the spirit of a 4-ingredient busy-night meal, any tweaks should swap ingredients rather than add lots of extras. For a smokier profile, use a smoky Cajun seasoning or one with chipotle, and choose a Parmesan with a bit more age for deeper flavor. If you can’t find a creamy Cajun or Cajun-style Alfredo sauce, mix a jar of plain Alfredo with a jar of tomato basil sauce in equal parts and season more assertively with your Cajun blend; it will still bake into that rich orange color. For a milder version, cut the Cajun seasoning in half and offer extra at the table so spice-lovers can sprinkle more on their portions. You can also play with pasta shapes—rigatoni or ziti bake similarly to penne and hold the sauce well. If the top browns faster than you’d like, loosely tent with foil for the last few minutes. This dish reheats nicely; add a splash of milk or water before warming in the oven, covered, to bring the creaminess back.
