I accidentally made this too good. Now it’s the only thing anyone wants me to bring to potluck.

This Slow Cooker Baked Mostaccioli is the ultimate “happy accident” turned staple—tender tubular pasta smothered in rich marinara, layered with gooey mozzarella and ricotta, all slow-cooked to golden, bubbling perfection. Inspired by Italian-American potluck classics, it delivers all the cozy comfort of a baked pasta casserole without heating up your kitchen or hovering over the stove.
With just 4 ingredients and one slow cooker, it’s the dish that keeps getting requested—and for good reason.

Why You’ll Love This Recipe

 Only 4 ingredients—pantry staples!
 15 minutes prep, then walk away
 One slow cooker = easy cleanup
 Costs under $9—feeds 6–8 generously
 Naturally nut-free & easily gluten-free (use GF pasta)

Ingredients You’ll Need

(6-quart slow cooker)
12 oz (340g) mostaccioli or penne pasta, uncooked
24 oz (3 cups) jarred marinara sauce (look for “no sugar added”)
15 oz (425g) whole-milk ricotta cheese
3 cups (12 oz) shredded mozzarella cheese, divided

 Pro Tips:
Do NOT pre-cook the pasta—it softens perfectly in the slow cooker.
Use whole-milk ricotta—low-fat versions make the dish watery.
Layer strategically: Sauce on bottom prevents sticking; cheese on top creates golden crust.

Step-by-Step Instructions (Creamy, Cheesy, Foolproof)

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