This five-ingredient slow cooker baked ziti (made with rotini) is the kind of fork-tender, smothered-in-goodness casserole I grew up on here in the Midwest. It’s all about cozy, cheesy comfort: pasta that soaks up the sauce, plenty of melty cheese on top, and that slow-simmered flavor without babysitting the oven. It’s perfect for busy weeknights, potlucks, or those Sundays when you want something that tastes like it took all day, but really came together with a few pantry staples.
Serve this slow cooker baked rotini with a crisp green salad tossed in a simple vinaigrette and some warm garlic bread or buttered rolls to soak up the extra sauce. A side of steamed green beans or roasted broccoli adds a nice bit of color and crunch to balance the richness. For family movie night, I like to scoop it into shallow bowls and pass around a shaker of grated Parmesan and some red pepper flakes so everyone can finish their bowl just the way they like it.
5-Ingredient Slow Cooker Baked Ziti (with Rotini)Servings: 6
Ingredients
16 ounces dry rotini pasta
48 ounces jarred marinara or pasta sauce (about 6 cups)
2 cups ricotta cheese (whole milk or part-skim)
3 cups shredded mozzarella cheese, divided
1 teaspoon garlic powder (or Italian seasoning blend), plus salt to taste
Directions
Lightly coat the inside of a large oval slow cooker (5–6 quart) with nonstick cooking spray or a thin layer of oil to help prevent sticking and make cleanup easier.
In a medium bowl, stir together the ricotta cheese, 1 cup of the shredded mozzarella, garlic powder, and a small pinch of salt until well combined. This mixture will give you that creamy, casserole-style middle layer.
Pour about 2 cups of marinara sauce into the bottom of the slow cooker and spread it out into an even layer. This keeps the dry pasta off the direct heat and helps it cook up fork-tender instead of dry.
Scatter half of the dry rotini evenly over the sauce in the slow cooker. Do not cook the pasta first; it will soften as it absorbs the sauce while it cooks.
Spoon half of the ricotta mixture over the dry pasta in small dollops, then gently spread or nudge it around with the back of a spoon so it covers most of the pasta in a rustic layer.
Pour about 2 more cups of marinara sauce over the ricotta layer, spreading it gently so it seeps down around the pasta. You want everything to be well-coated so the rotini can soak up enough liquid.
Add the remaining dry rotini in an even layer. Top with the remaining ricotta mixture in dollops, then pour the rest of the marinara sauce over the top, making sure no dry pasta is peeking through. If needed, you can gently press any exposed pasta under the sauce with a spoon.
Cover the slow cooker with the lid and cook on LOW for 2 1/2 to 3 1/2 hours, or until the pasta is tender when pierced with a fork but not mushy. Try not to lift the lid in the first 2 hours so the heat stays consistent.
Once the pasta is tender, sprinkle the remaining 2 cups of shredded mozzarella evenly over the top. Cover again and cook on LOW for another 15–20 minutes, or until the cheese is completely melted, bubbly around the edges, and lightly golden in spots.
Turn off the slow cooker and let the baked rotini rest, covered, for about 10 minutes. This short rest helps the casserole set up a bit so it scoops nicely and the cheese stretches beautifully when you serve.
Scoop generous spoonfuls into bowls or onto plates, making sure each serving has some of the creamy center and the smothered, cheesy top. Serve hot, with extra grated Parmesan and a sprinkle of dried herbs or red pepper flakes if your family likes a little kick.
Variations & Tips
To add protein while still keeping things simple, you can brown 1 pound of ground beef, Italian sausage, or ground turkey with a pinch of salt and pepper, then stir it into the marinara before layering. For a veggie boost, layer in 1–2 cups of chopped fresh spinach, sliced mushrooms, or finely diced bell peppers over the first layer of pasta; they’ll soften right into the sauce as it cooks. If you have picky eaters, keep the base recipe as is and offer toppings at the table: extra mozzarella, grated Parmesan, red pepper flakes, or a little extra marinara warmed on the side. For a slightly lighter version, use part-skim ricotta and reduced-fat mozzarella; just know it may not be quite as rich, but it will still be cozy and satisfying. You can also swap the garlic powder for Italian seasoning or dried basil and oregano if that’s what you have on hand. Food safety tips: Make sure any meat you add is fully cooked and drained of excess fat before it goes into the slow cooker, since this recipe is timed for already-cooked proteins. Do not leave cooked pasta sitting on the warm setting for more than 2 hours; after serving, cool leftovers quickly and refrigerate within 2 hours in shallow containers. Reheat leftovers until steaming hot all the way through (165°F/74°C) before serving. If the pasta seems to be cooking too fast in your particular slow cooker, switch it to the WARM setting a bit earlier to prevent overcooking and mushiness.
