One-Pan French Onion Rigatoni with Blistered Gruyere Crust Tips, FAQ & printable recipe

Tips for success

For the best caramelization, use a heavy skillet and be patient. Stir the onions occasionally, but let them sit long enough to develop color.

If the pan looks dry, add a splash of water or broth, but avoid burning the butter. The onions should be soft and deeply browned, not crispy. This step builds the entire flavor of the dish, so don't rush it.

When broiling the cheese, keep a close eye on it. Broilers vary wildly, and the cheese can go from blistered to burnt in seconds. Place the skillet on the top rack and watch it until it reaches the desired color.

If your skillet isn't broiler-safe, you can melt the cheese under a regular broiler on a baking sheet, but cast iron is ideal.

Variations

• Add mushrooms: Sauté 8 oz sliced cremini mushrooms with the onions for an earthy twist. The mushrooms will release moisture and then brown, adding depth to the sauce.
• Use white wine: Deglaze the skillet with 1/2 cup dry white wine after caramelizing the onions, scraping up the browned bits. Let it reduce by half before adding the cream.
• Make it spicy: Add a pinch of red pepper flakes or a drizzle of hot honey before serving to balance the richness with heat and sweetness.
• Swap the pasta: Use penne, ziti, or even shells. The sauce clings to any shape, but short pasta with ridges works best.

Storage and make-ahead

Fridge

Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat gently in a skillet with a splash of cream to restore the sauce.

Freezer

Freeze in a freezer-safe container for up to 2 months. Thaw overnight in the refrigerator before reheating.

Reheat

Reheat in a skillet over medium heat, adding a splash of cream or milk to loosen the sauce. Cover and heat until bubbling.

Leftovers can be refrigerated in an airtight container for up to 3 days. The cheese crust will soften, but the flavor remains. Reheat in a skillet over medium heat with a splash of cream or milk to restore the sauce's creaminess. Avoid microwaving, as it can make the pasta tough.

The onions can be caramelized up to 2 days ahead and stored in the refrigerator. Cook the pasta and assemble the dish, then cover and refrigerate. When ready to serve, bring it to room temperature for 30 minutes, then broil as directed. The cheese can be grated ahead and kept in a sealed bag.

Serving ideas

Serve the French onion rigatoni directly from the cast iron skillet, letting guests pull their own cheesy portions. The blistered cheese crust is the centerpiece, so present it whole and cut into wedges or scoop out generous portions.

A simple green salad with a tangy vinaigrette balances the richness, and crusty bread is perfect for sopping up any extra sauce.

For a complete meal, pair it with a light vegetable side like roasted asparagus or sautéed spinach. A glass of dry white wine or a light red complements the nutty cheese and sweet onions.

The dish is filling on its own, so keep sides simple. Leftovers can be enjoyed cold or reheated, though the cheese won't stretch as much.

Frequently asked questions

Recipe card

One-Pan French Onion Rigatoni with Blistered Gruyere Crust

Prep 15 minCook 35 minTotal 50 minServes 4

Ingredients

• 3 large Vidalia onions, sliced into crescents
• 2 tbsp fresh thyme leaves, plus more for serving
• 8 oz aged Swiss Gruyere, shredded
• 4 oz provolone, shredded
• 12 oz rigatoni pasta
• 4 tbsp unsalted butter
• 1 cup heavy cream
• Cracked black pepper, for serving

Instructions

1. Slice the Vidalia onions into uniform crescents, about 1/4-inch thick. Strip the fresh thyme leaves from the stems and set aside. Grate the aged Gruyere and provolone on the large holes of a box grater into a single pile of shredded cheese.
2. Bring a large pot of salted water to a boil. Add the rigatoni and cook until al dente according to package directions. Drain well and set aside.
3. Melt the butter in a large cast iron skillet over medium heat. Add the sliced onions and cook, stirring occasionally, until deeply golden and caramelized, about 20 minutes.
4. Pour the heavy cream into the skillet with the caramelized onions. Stir to combine and let the cream bubble gently for 2 to 3 minutes until slightly thickened.
5. Add the drained rigatoni and half of the fresh thyme leaves to the skillet. Fold gently until every piece of pasta is coated with the creamy onion sauce.
6. Sprinkle the shredded Gruyere and provolone evenly over the pasta, covering the entire surface in a thick, even layer.
7. Place the skillet under the broiler and cook until the cheese is melted, golden, and blistered in spots, about 3 to 5 minutes.
8. Scatter the remaining fresh thyme leaves and cracked black pepper over the blistered cheese. Pull up a portion with a spoon to show the long, cheesy stretch, then serve hot.

Contains: gluten, milk

Estimated nutrition per serving

Calories

720

Protein

28 g

Carbohydrates

58 g

Fat

42 g

Automatic estimate from the ingredient list, not laboratory-verified.