• Skip to main content
  • Skip to primary sidebar
Casserole Recipes
menu icon
go to homepage
  • Easy
  • Beef
  • Chicken
  • Pork
  • Turkey
  • Make Ahead
  • Cheese
  • Vegetarian
  • Vegetable
  • Breakfast
  • Dinner
  • Side Dish
search icon
Homepage link
  • Easy
  • Beef
  • Chicken
  • Pork
  • Turkey
  • Make Ahead
  • Cheese
  • Vegetarian
  • Vegetable
  • Breakfast
  • Dinner
  • Side Dish
×

Caramelized Onion Pasta Bake

Modified: Aug 12, 2025 by Chantal Kirkland · This post may contain affiliate links · Leave a Comment

Jump to Recipe Jump to Video Print Recipe

Caramelized onions add a level of sophistication and depth to any dish, and when paired with pasta and cheese, they create an irresistible combination. This Caramelized Onion Pasta Bake is not only easy to make but also offers a comforting, rich flavor that both kids and adults will love. The crunchiness of the baked cheese on top contrasts beautifully with the creamy pasta underneath, making every bite a delight.

bowl with a serving of caramelized onion pasta bake ready to enjoy
Jump to:
  • Caramelized Onion Pasta Bake
  • 📖Printable Recipe:
  • Caramelized Onion Pasta Bake
  • 📋Ingredients
  • 🔪How Do I Make It?
  • 🍽What Do I Serve With This Casserole Dish?
  • ⏲️Chef's Tip
  • 💭Frequently Asked Questions
  • 🥘More Easy Casseroles

Caramelized Onion Pasta Bake

🎥Video Recipe:

📖Printable Recipe:

bowl with a serving of caramelized onion pasta bake ready to enjoy

Caramelized Onion Pasta Bake

The combination of caramelized onions, creamy sauce, and melted cheese of Caramelized Onion Pasta Bake creates a comforting and satisfying meal that everyone will love.
No ratings yet
Print Recipe Pin Recipe
Prep Time 20 minutes mins
Cook Time 1 hour hr
Course Main Course
Cuisine American
Servings 4
Calories 805 kcal

Ingredients
  

  • 4 medium white onions sliced
  • 4 medium shallots sliced
  • 3 thyme sprigs
  • 150 ml 5 fl.oz dry white wine
  • 350 g 12 oz shell pasta
  • 150 ml 5 fl.oz cream
  • 2 tablespoon soy sauce
  • 2 tablespoon sugar
  • 150 g 5 oz gruyere cheese, shredded
  • 3 tablespoon butter

Instructions
 

  • Preheat the oven  to 200C/400F.
  • Melt butter in a heavy cast iron skillet. Cook white onions and shallots for 15 minutes, adding a pinch of salt to it.
    4 medium white onions, 3 tablespoon butter, 4 medium shallots
    onions and shallots being sauteed together to make caramelized onion pasta bake
  • Mix onions with sugar and soy sauce, cook for 10 minutes more. Pour in white wine, add thyme and continue cooking for 15 minutes more.
    150 ml 5 fl.oz dry white wine, 2 tablespoon soy sauce, 2 tablespoon sugar, 3 thyme sprigs
    onions and seasonings being sauteed together to make caramelized onion pasta bake
  • Meanwhile, cook pasta al-dente, saving about ½ cup pasta water.
    350 g 12 oz shell pasta
  • Mix pasta with onions, pour in pasta water and full-fat cream, bring to a boil and transfer into a baking pan.
    150 ml 5 fl.oz cream
    adding pasta to the skillet with the onions to make caramelized onion pasta bake
  • Top pasta with cheese. Bake for 15 minutes.
    150 g 5 oz gruyere cheese, shredded
    final step of making caramelized onion pasta bake by topping it with cheese prior to baking

Video

Nutrition

Calories: 805kcalCarbohydrates: 89gProtein: 27gFat: 36gSaturated Fat: 21gPolyunsaturated Fat: 2gMonounsaturated Fat: 10gTrans Fat: 0.3gCholesterol: 106mgSodium: 863mgPotassium: 559mgFiber: 6gSugar: 17gVitamin A: 1211IUVitamin C: 12mgCalcium: 467mgIron: 2mg
Keyword bake, caramelized onion, casserole, Gruyere Cheese, pasta
Tried this recipe?Let us know how it was!

📋Ingredients

  • 4 medium white onions, sliced
  • 4 medium shallots, sliced
  • 3 thyme sprigs
  • 150 ml (5 fl.oz) dry white wine
  • 350 g (12 oz) shell pasta
  • 150 ml (5 fl.oz) cream
  • 2 tablespoon soy sauce
  • 2 tablespoon sugar
  • 150 g (5 oz) gruyere cheese, shredded
  • 3 tablespoon butter
ingredients to make caramelized onion pasta bake laid out on a table

🔪How Do I Make It?

Preheat the oven  to 200C/400F.

Melt butter in a heavy cast iron skillet. Cook white onions and shallots for 15 minutes, adding a pinch of salt to it.

onions and shallots being sauteed together to make caramelized onion pasta bake

Mix onions with sugar and soy sauce, cook for 10 minutes more. Pour in white wine, add thyme and continue cooking for 15 minutes more. 

onions and seasonings being sauteed together to make caramelized onion pasta bake

Meanwhile, cook pasta al-dente, saving about ½ cup pasta water.

Mix pasta with onions, pour in pasta water and full-fat cream, bring to a boil and transfer into a baking pan.

adding pasta to the skillet with the onions to make caramelized onion pasta bake

Top pasta with cheese. Bake for 15 minutes.

final step of making caramelized onion pasta bake by topping it with cheese prior to baking

🍽What Do I Serve With This Casserole Dish?

While this caramelized onion pasta bake is a standout dish on its own, pairing it with the right sides can elevate the meal. Here are some ideas:

Fresh Green Salad

A simple green salad with a zesty vinaigrette can balance out the richness of the pasta bake.

Garlic Bread

Crispy garlic bread is perfect for mopping up any leftover sauce from your plate.

Steamed Vegetables

Lightly steamed broccoli or green beans add a healthy touch and a splash of color to your meal.

By serving these sides, you can create a well-rounded and satisfying dinner that will impress your family and guests alike.

baking dish of caramelized onion pasta bake ready to serve

⏲️Chef's Tip

Patience is Key

To achieve perfectly caramelized onions, patience is your best tool. Cooking them slowly over medium heat allows the natural sugars within the onions to break down gradually, resulting in that deep, sweet, and robust flavor that elevates any dish.

Slow and Steady Wins the Race

Avoid the temptation to rush. The process is worth the wait as it transforms ordinary onions into a beautiful golden-brown masterpiece. Stir occasionally to ensure even cooking and prevent any sticking or burning.

Enhancing with Protein

If you're looking to add protein to your dish, consider incorporating cooked chicken or Italian sausage for an additional layer of flavor and heartiness. These proteins pair beautifully with the sweet, savory balance of caramelized onions.

caramelized onion pasta bake being served from a casserole dish

💭Frequently Asked Questions

How Can I Make This Ahead of Time?

Absolutely! You can prepare the entire dish up to the point of baking. Cover it with foil and store it in the fridge. When you're ready to serve, simply bake it in the oven until it's hot and bubbly.

Can I Use a Different Type of Cheese?

Yes, while Gruyere adds a nice nutty flavor, you can substitute it with other melty cheeses like mozzarella or cheddar. Each will bring its own unique taste to the dish.

Is There a Gluten-Free Option?

Certainly! Just substitute the shell pasta with a gluten-free variety, and you're good to go. The rest of the ingredients are naturally gluten-free.

Can I Freeze the Leftovers?

Yes, this pasta bake freezes well. Allow the dish to cool completely before transferring it to an airtight container. Label it with the date and store it in the freezer for up to three months. When you're ready to eat, let it thaw in the refrigerator overnight and reheat it in the oven until it's piping hot.

What Kind of Pasta Works Best?

While shell pasta is recommended for its texture and ability to hold sauce, penne, rigatoni, or rotini are also excellent choices. These types effectively trap the creamy sauce and onions, ensuring a flavorful bite every time.

How Can I Add More Vegetables?

Consider adding sautéed mushrooms, spinach, or bell peppers to the dish for extra nutrients and flavor. Mix them in with the caramelized onions before combining everything with the pasta and cheese.

Is It Possible to Make This Dish Vegetarian?

Certainly! This recipe is already vegetarian, but you can enhance the veggie aspect by adding more of your favorite vegetables or even incorporating nuts like pine nuts or walnuts for added richness and texture.

casserole dish of caramelized onion pasta bake fresh from the oven ready to serve

🥘More Easy Casseroles

If you loved this caramelized onion pasta bake, you'll want to explore more of our easy casserole recipes. From cheesy potato casseroles to vegetable bakes, there's a world of comforting, family-friendly dinner ideas waiting for you.

  • Green Bean Casserole
  • String Bean and Mushroom Casserole
  • Pineapple Casserole
  • Twice-Baked Potato Casserole
  • Spinach Casserole
  • Scalloped Potatoes Casserole
  • Mashed Potatoes Casserole
  • Cheesy Corn Casserole
  • Asparagus Casserole

More Best Cheese Recipes

  • spoon lifting a serving of cheat lasagne bake from a cast iron skillet
    Cheat Lasagne
  • Tennessee Onions
  • Creamy Squash Casserole
  • spatula lifting a serving of Cacio e Pepe Casserole from a baking dish
    Cacio e Pepe Casserole

Sharing is caring!

  • Facebook18
  • Twitter
  • Reddit

Reader Interactions

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Recipe Rating




Primary Sidebar

Casserole recipe logo

Hi, I'm Lindsey! Try my favorite casserole recipes I've developed over the years. Each recipe comes with a video demonstration and printable option.

P.S Feel free to share my recipes on your blog, using 1 image and a link back to the recipe directions.

Recipe Index →

Popular Recipes

  • serving of Okonomiyaki bake being lifted using a spatula
    Okonomiyaki Bake 
  • spoon scooping up a serving of peach, almond and caramel self-saucing pudding from a casserole dish
    Peach, Almond and Caramel Self-Saucing Pudding
  • Chocolate Cobbler
  • serving of baked denver omelette on a plate ready to enjoy
    Baked Denver Omelet

Casseroles You should make now!

  • Asparagus Casserole
  • Baked chicken coconut and rice casserole in a glass dish.
    Chicken, Coconut, and Rice Casserole
  • Chicken meatball casserole freshly baked.
    Chicken Meatball Casserole
  • Cowboy Casserole

Helpful Pages

Privacy policy

About / Contact Me

Copyright © 2025 Casserole Recipes | All Rights Reserved

Rate This Recipe

Your vote:




A rating is required
A name is required
An email is required