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There’s nothing more comforting than a bubbling dish of baked mostaccioli fresh from the oven. Tender pasta, sweet Italian sausage, a rich two-sauce blend, and that melty mozzarella topping come together in the kind of cozy, family-style casserole that tastes like it simmered in grandma’s kitchen all afternoon.
The combination of marinara and Alfredo gives this mostaccioli its signature creamy-meets-savory richness, while sautéed onions, garlic, and toasted Italian seasoning build a beautiful depth of flavor. Sweet Italian sausage ties everything together with that classic, comforting taste we all love.
If you love comforting Italian pasta bakes, you’ll also enjoy my Baked Ziti with Ricotta, Chicken Lasagna, and Weeknight Bolognese — and for something slightly different but just as cozy, try my Baked Rigatoni.
Let’s get this delicious pan of pasta in the oven — your kitchen’s about to smell amazing.
✨ Before You Begin
✨ Salt the pasta water generously. This seasons the pasta from the inside out and makes a huge difference in the final dish.
✨ Cook the pasta just to al dente. It will continue cooking in the oven, so keeping it slightly firm prevents mushiness.
✨ Chop aromatics evenly. Onions and garlic that are the same size cook evenly, giving you sweeter, more balanced flavor.
✨ Sauté the aromatics low and slow. This coaxes out natural sweetness and avoids bitterness.
✨ Toast the Italian seasoning. Letting the dried herbs bloom in the warm pan brings all their aroma back to life.
✨ Use sweet Italian sausage if you can. It adds rich, savory depth with a hint of sweetness that truly makes this dish special.
Mostaccioli Ingredients + Key Notes
This is just a quick glance at what you’ll need. For exact measurements and the full ingredient list, head down to the recipe card below.
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Mostaccioli: Tubular pasta perfect for catching sauce inside every bite. Penne or ziti work if needed.
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Sweet Italian sausage: Use your favorite brand; remove casings so it cooks like ground meat.
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Onion & garlic: Cooked low and slow for sweetness.
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Italian seasoning: Toasting it briefly makes a major flavor difference.
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Spaghetti sauce + Alfredo: The best of both worlds — saucy, creamy, bold.
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Mozzarella: Half gets mixed in for creaminess, half melts beautifully on top.
Recipe Variations
🥄 Swap the pasta: Penne, rigatoni, or ziti all work beautifully.
🥄 Lighten it up: Use turkey Italian sausage.
🥄 Add veggies: Mushrooms or bell peppers sauté beautifully in this sauce.
🥄 Change the cheese: Try Italian six-cheese blend, provolone, or add dollops of ricotta in the middle.
⭐ Pro Tips
⭐ Go heavy on the salt in your pasta water. Your pasta is the backbone of the dish, so seasoning it well ensures every bite tastes full and rich — not flat.
⭐ Let the onions get really soft. This extra 10 minutes transforms them from sharp and pungent to sweet and mellow, building a richer sauce.
⭐ Toast those dried herbs! A minute in a warm pan reinvigorates their aroma and makes the dish taste fresher and more homemade.
⭐ Mix half the cheese in and half on top. This gives you creamy pockets throughout the pasta and that irresistible cheesy top layer.
⭐ Use a large baking dish if you want to layer ricotta. It turns this mostaccioli into a lasagna-style bake readers absolutely love.
🥣 How to Make Baked Mostaccioli
Ready to make the coziest Italian bake? Here’s the quick version:
Cook your pasta to al dente → brown the sausage → sauté the aromatics → bloom the Italian seasoning → stir in both sauces → combine with pasta and cheese → bake until bubbly and golden.
Storing + Reheating + Freezing + Make-Ahead Tips
Storing
- Keep leftovers in an airtight container for 3–4 days.
Reheating
- Reheat covered at 350°F for 15–20 minutes. (Let cold ceramic/glass warm at room temp for 20–30 minutes to prevent shattering.)
- Or microwave in short bursts with a splash of water.
Freezing
- Freeze before or after baking. Wrap tightly in plastic + foil. Freeze up to 2 months. Thaw overnight in the fridge before reheating.
Make-Ahead
- Assemble up to 24 hours in advance. Cover and refrigerate. Add 10–15 extra minutes of bake time if going into the oven cold.
Food Safety
- If you’d like more info on food safety, check out this link.
What to Serve With Mostaccioli
Fresh + Crisp Sides:
Cozy Breads:
Sweet Finishes:
✦ FAQs
✦ Can I prep this the night before?
Yes! Assemble, cover tightly, and refrigerate. Add a little extra bake time if cold.
✦ Can I use ground beef instead of sausage?
You can — but sweet Italian sausage gives the dish its classic flavor. A 50/50 mix works great.
✦ Can I use homemade sauces?
Absolutely. As long as you have about 5–6 cups total, the recipe works perfectly. Try it with my homemade Marinara Sauce.
✦ Can I freeze baked mostaccioli?
Yes — it freezes beautifully. Wrap tightly and freeze up to 2 month
More Yummy Pasta Casserole Recipes
If you love comforting, saucy pasta bakes like this one, here are a few more favorites to try next:
- Million Dollar Spaghetti — the ultimate layered spaghetti bake with a rich, creamy center and tons of cheesy goodness.
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Lasagna — a classic, hearty Italian favorite with layers of pasta, meat sauce, and melty cheese.
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Stuffed Shells — tender pasta shells filled with creamy ricotta and baked in savory marinara.
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Cannelloni Recipe — a cozy Italian bake filled with a rich, savory mixture and blanketed in sauce and cheese.
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Pizza Casserole — all your favorite pizza flavors baked into one bubbly, cheesy pasta dish.
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Spaghetti Pie — a fun, family-friendly twist where spaghetti becomes the “crust” for a hearty baked casserole.
- Johnny Marzetti Casserole —A nostalgic Midwest favorite made with tender pasta, seasoned ground beef, savory tomato sauce, and plenty of melty cheese. It’s hearty, comforting, and the kind of old-fashioned baked pasta that feeds a crowd with ease.
Tried This Recipe?
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If you enjoyed this recipe, please take a moment to leave ⭐️⭐️⭐️⭐️⭐️ star rating and a quick comment — I love hearing from you and it helps our community of bakers and cooks!
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Thanks for stopping by my kitchen today — happy cooking, friends! 💗 Kathleen
Mostaccioli
Ingredients
- 1 (16-ounce) box mostaccioli
- 1 1/2 pounds sweet Italian sausage casing removed
- 2 cups yellow onion chopped
- 1 tablespoon garlic minced
- 1 1/2 tablespoons dried Italian seasoning
- 1/2 teaspoon salt
- 3/4 teaspoon black pepper
- 1 (24-ounce) jar spaghetti sauce
- 1 (15-ounce) jar Alfredo sauce
- 16 ounces Mozzarella shredded~divided
- fresh parsley Chopped
Instructions
- Preheat oven to 350°F (177°C). Spray a 9X13 inch baking dish with nonstick cooking spray.
- Cook pasta (16 ounces) according to package instructions, in a large pot, just until al dente. Drain and set aside. Dry out the pot and set it aside.
- In another large pot, brown sausage (1 1/2 pounds) over medium heat, crumbling with a spoon as it cooks, until no longer pink; Remove sausage to a paper towel-lined plate; set aside.
- Pour off and discard all but 2 tablespoons of the fat from the pan. Add the onion (2 cups) and garlic (1 tablespoon) then sauté on low heat until they're very soft about 10 minutes.
- Turn up the heat to medium. Add the dried Italian seasoning (1 1/2 tablespoons), salt (1/2 teaspoon), and pepper (3/4 teaspoon) to the onion mixture and continue to sauté, stirring constantly, until fragrant, 1-2 minutes.
- Add spaghetti sauce (1 jar), alfredo sauce (1 jar), and drained sausage, to skillet and mix.
- In the dried pasta pot combine the drained pasta, half the mozzarella, and the sausage-sauce mixture. Mix until evenly combined. Pour into prepared baking pan. Evenly sprinkle top with remaining mozzarella. Bake, uncovered, in preheated oven for 40-50 minutes, until heated through and cheese is melted. Garnish with fresh parsley. Serve.
Notes
- Salting The Pasta Water: You must salt your pasta water! No, it doesn’t lower the boiling point of the water, but it does add a ton of flavor. Pasta naturally absorbs water as it cooks. If that water is properly salted, it will absorb salt too. This process essentially seasons the pasta from the inside out giving it a far superior flavor. Be generous, too. I have found that about 1 ½ - 2 tablespoons of salt work best in 4-6 quarts of water.
- Cooking Pasta: Since the mostaccioli pasta is the star of your dish, you’ll want to make sure it is cooked to a tee. Cooking your pasta al dente will prevent it from becoming mushy as it continues to cook in the oven. Al dente is slightly firm, but not hard, in the middle.
- Size Matters: Chopping all the aromatic veggies roughly the same size also helps the flavor profile. If they are similar in size, then all the little pieces will reach the same stage in the cooking process together. It's kind of a scientific thing but it really helps with flavor too!
- Sautéing Aromatics: This is very important to the flavor of the finished dish. It brings out their natural sweetness for a more mellow balanced flavor profile.
- Toast Spices: Toasting the Italian seasoning in a warm pan allows them to release its aromatic nuances and reinvigorate flavors. In essence, it lets them bloom.
- Using your favorite sweet Italian sausage amps up the taste factor of your baked mostaccioli tremendously! Just make sure you remove the casing and cook it like ground beef. That slightly sweet savory meat adds something very special that just sends this dish over the top!
YUM! YUM! YUM! THAT SAYS IT ALL!!!
Thank you so much, Karla! 🙂
This dish was awesome! I added green pepper when cooking the onion, garlic, and Italian Seasoning. I did add Italian sausage, and slow cooked the sausage, veggies, and sauces together for 5 hours., then assembled as directed using Ricotta in between two layers of the pasta mixture. I made it for a block party pot luck and it vanished!
I’m so happy it was a hit for you Jill!
Oh, my gosh – this is pure heaven. Thanks so much for a fabulous recipe that I will make over and over!
Hi, Betty! Thank you so much! I’m happy you like this as much as we do 🙂
Looks great
My mother used to make this! I lost her recipe and I’m so glad I found this! Will be making tomorrow. Thank you for this recipe again. It brings back many memories.
Thank you, Karen! I’m glad this recipe made you happy! <3
Best. Recipe. Ever!!!!! We ate the entire casserole dish in 1 meal, whoopsie!
Wow! Thank you! Next time make an extra batch 🙂
Don’t see a link to the video? Am I missing something.
Looks great
Thanks so much, Patricia! It’s a big favorite at our house!
Can’t find the video
Thanks Kathleen! I’m making it tonight!
Your assome
Thank you so much Cherl 🙂
Oh yes ! Gonna want seconds 🙂 Thnak you so much !