Weeknight Baked Spaghetti with Melty Mozzarella

Jennifer Miller

This weeknight baked spaghetti is my swift, soulful nod to Italian-American comfort—cheesy, saucy, and joyfully bubbly from the oven in about half an hour. Inspired by the Sunday casseroles I grew up with, this version streamlines technique: a bright, quick-cooked tomato sauce clings to just-shy-of-al-dente spaghetti, then everything is kissed under high heat for that irresistible golden, stretchy cheese cap. The result is weeknight-simple yet special enough for company.

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Prep Time 15

Cook Time 20

Total Time 35

Course Main Course

Cuisine Italian

Servings bowls

Calories 795 kcal

Equipment

Large pot (6–8 qt) for boiling pasta
Colander
12-inch oven-safe skillet or 9x13-inch baking dish
Chefs Knife
Cutting board
Wooden spoon
Measuring cups and spoons
Box grater (for mozzarella and Parmesan)
Ladle or heatproof measuring cup (to reserve pasta water)
Oven mitts
Aluminum Foil (optional, to prevent over-browning)

Ingredients

1 teaspoon extra-virgin olive oil for greasing the baking dish or skillet
1 tablespoon kosher salt for pasta water (Diamond Crystal preferred); plus more to taste
12 oz dried spaghetti high-quality durum wheat for best texture (e.g., De Cecco or Barilla)
2 tablespoons extra-virgin olive oil for sautéing; a fruity, peppery oil adds depth
1 small yellow onion, finely diced about 1 cup, diced finely for quick sweetness
3 cloves garlic, minced freshly minced for best aroma
¼ teaspoon crushed red pepper flakes optional, for gentle heat and depth
8 oz ground beef (85% lean) or sweet Italian sausage, casings removed
2 tablespoons tomato paste double-concentrated if available for richer flavor
1 can crushed tomatoes, (15 oz) San Marzano–style recommended for balanced acidity
1 teaspoon dried oregano rub between fingers to release oils
½ teaspoon freshly ground black pepper
½ teaspoon granulated sugar optional, to soften acidity if needed
½ cup reserved pasta water starchy water helps sauce cling
1 ½ cups whole-milk mozzarella, shredded about 6 oz; low-moisture for best browning and stretch
½ cup Parmesan cheese, finely grated about 1.5 oz; Parmigiano Reggiano preferred
½ cup whole-milk ricotta dolloped for creamy pockets
¼ cup fresh basil leaves, torn for garnish; flat-leaf parsley also works

Instructions

Preheat and Prepare the Dish (2 minutes): Set the oven to 425°F (220°C). Lightly grease a 12-inch oven-safe skillet or a 9x13-inch baking dish with 1 teaspoon olive oil.
Boil the Pasta (10 minutes): Bring 4 quarts of water to a rolling boil. Season with 1 tablespoon kosher salt (the water should taste like the sea). Add 12 oz spaghetti and cook 2 minutes shy of al dente according to package directions. Reserve 1/2 cup pasta water, then drain well. The spaghetti should be pliable with a firm, chalky core—perfect for finishing in the oven.
Start the Sauce while Pasta Cooks (6–7 minutes): Heat 2 tablespoons olive oil in a large skillet over medium-high heat until shimmering. Add diced onion with a pinch of salt; sauté 2–3 minutes until translucent with light golden edges. Stir in garlic and red pepper flakes; cook 30–45 seconds until fragrant (avoid browning the garlic).
Brown the Meat (3–4 minutes): Add ground beef, breaking it into small crumbles. Cook until no pink remains and edges begin to caramelize. If excess fat accumulates, spoon off a bit for a lighter sauce.
Build Fast Flavor (2–3 minutes): Stir in tomato paste and cook 1 minute until it turns brick-red and smells sweet. Add crushed tomatoes, oregano, black pepper, and optional sugar. Splash in 1/4 cup reserved pasta water and simmer 2–3 minutes; the sauce should thicken slightly and gloss the spoon.
Combine with Pasta (1–2 minutes): Add drained spaghetti to the sauce and toss vigorously. Fold in 1 cup mozzarella and 1/4 cup Parmesan until strands look saucy and lightly cheesy. Add more reserved pasta water in small splashes as needed until the sauce clings silkily.
Assemble and Bake (8–10 minutes): Transfer the mixture to your prepared dish (or leave in an oven-safe skillet). Dot ricotta over the top, then sprinkle with remaining 1/2 cup mozzarella and 1/4 cup Parmesan. Bake at 425°F (220°C) for 8–10 minutes, until the cheese is molten and the edges are gently caramelized. For extra color, broil on high for 1–2 minutes, watching closely.
Rest and Finish (3 minutes): Let the bake rest 3 minutes to set. Garnish with torn basil. The perfect bake is bubbling with golden freckles, smells of sweet tomato and garlic, and slices cleanly with a spoon.
Technique Notes: Finely dicing the onion speeds cooking and sweetness. Cooking pasta slightly under keeps it from overcooking during the bake. If you don’t have an oven-safe skillet, assemble in a pre-greased 9x13-inch dish.

Notes

Jen’s Tips:

Layered Seasoning: Salt the dish at three points—pasta water, meat, and final taste—rather than adding a lot at the end.
Better Browning Fast: Let the meat make full contact with the pan and resist stirring for 60–90 seconds to develop fond (those tasty brown bits) that enrich the sauce.
Cheese Choice: Low-moisture, whole-milk mozzarella browns and stretches better than fresh. If using fresh mozzarella, pat dry and tear into small pieces to avoid excess moisture.
Dietary Swaps: Use gluten-free spaghetti; swap beef for plant-based crumbles or sautéed mushrooms. For dairy-free, use your favorite meltable vegan mozzarella and almond “ricotta.”
Brighter Sauce: Finish with a teaspoon of red wine vinegar or a squeeze of lemon if your tomatoes taste flat.
Make it Spicier: Add a pinch of Calabrian chili paste with the tomato paste for a layered heat.

Serving Suggestions:

Spoon generous heaps into warm, shallow bowls. Finish with a light drizzle of extra-virgin olive oil, a flutter of basil, and a final snowfall of Parmesan. Pair with a sharply dressed arugula salad and garlicky bread. A medium-bodied Italian red (Chianti or Montepulciano) or sparkling water with lemon cuts through the richness.

Culinary Context:

A weeknight-friendly riff on Italian pasta al forno, this baked spaghetti borrows the Italian-American love of bubbly cheese while keeping the sauce bright and quick—no long simmer needed. It’s the kind of dish nonna would approve of for its thrift and comfort, and busy cooks love for its speed.

Optional Advanced Instructions:

Make-Ahead: Sauce can be prepared up to 3 days ahead and refrigerated, or frozen for 1 month. Reheat gently before tossing with pasta.
Par-Cook and Hold: Boil spaghetti 3 minutes shy of al dente, toss with a teaspoon of oil, and refrigerate up to 24 hours. Assemble and bake 12–14 minutes from cold.
Beginner Alternative: Skip the broiler step and simply bake until cheese is melted and lightly golden.

Timing:

Prep Time: 0 hours 15 minutes
Cooking Time: 0 hours 20 minutes
Total Time: 0 hours 35 minutes

Course:

Dinner (Main Course)

Origin:

Italian-American, inspired by Italian al forno traditions

Nutrition

Calories: 795kcalCarbohydrates: 79gProtein: 41gFat: 35gSaturated Fat: 15gPolyunsaturated Fat: 2gMonounsaturated Fat: 14gTrans Fat: 1gCholesterol: 98mgSodium: 2499mgPotassium: 878mgFiber: 6gSugar: 10gVitamin A: 1000IUVitamin C: 13mgCalcium: 473mgIron: 5mg

Keyword 30-minute dinner, baked spaghetti recipe, cheesy spaghetti bake, family-friendly, weeknight pasta

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