Crave-Worthy French Onion Stuffed Shells

Crave-Worthy French Onion Stuffed Shells

Everything you love about French onion soup is in these Crave-Worthy French Onion Stuffed Shells. But now it’s in a brand new (yet still incredibly delicious, and cheesy) unexpected form.

Crave-worthy French Onion Stuffed Shells -

Since my recipe for French Onion Pork Chops is still one of the most popular posts on my blog, I keep trying to reinvent different ways to bring the rich, slightly sweet and savory flavors of deeply caramelized onions smothered in melted cheese to the dinner table in unusual ways. Enter, Crave-Worthy French Onion Stuffed Shells.

Crave-Worthy French Onion Stuffed Shells -

Imagine if you will, deeply caramelized onions (cooked in a slow cooker) with red wine, butter, beef broth and thyme until they’re sweet and pungent. The onions are stuffed into large, perfectly cooked pasta shells until they’re practically overflowing.

The stuffed shells are then layered on top of toasted, garlicky French bread, topped with an abundant mixture of grated Swiss, and Gruyere cheeses, and popped into the oven, so the cheese melts into a blanket of golden, gooey, goodness.

Be still my French onion loving heart!

Crave-Worthy French Onion Stuffed Shells Recipe -

As I mentioned earlier, I’m all about the brilliance of French onion deliciousness and have posted many different versions of the caramelized onion and cheese-themed based preparations in the past. Not the least of which are the following recipes for:

French Onion Pork Chops (that I spoke of earlier):

French Onions Pork Chop Recipe

French Onion Pizza:

French Onion Pizza Recipe -

And, because everyone loves chicken, Cheesy French Onion Chicken:

Cheesy French Onion Chicken Recipe -

As with all of these recipes I’ve shared the items that remain constant in my creations for French onion fare are the same ones that make French onion soup so iconic and beloved. The base of a substantial, crusty bread, the abundance of intensely flavorful, and perfectly caramelized onions, and of course, the best part of all (in my book) the topping of creamy, melted cheeses.

As you can see, Crave-Worthy French Onion Stuffed Shells ticks all those boxes, and adds pasta to boot! Yeah, baby!

French Onions Stuffed Shells Recipe -

Along with the printer friendly version of this recipe for Crave-Worthy French Onion Stuffed Shells (which follows shortly), I’m happy to also share with you my step-by-step photo tutorial in case you’re a visual learner like I am.

Ready to get cooking? Good! Let’s begin!

Crave-Worthy French Onion Stuffed Shells:

Add butter and olive oil to a 7-quart slow cooker. Slice 5 large sweet onions and add them to the cooker along with salt and pepper.

How to make French Onion Stuffed Shells

To the onions, add beef broth, red wine, and fresh thyme sprigs.

Making French Onion Stuffed Shells

Cover and cook on high for 8 hours, stirring occasionally. Allow the onions to cool and then place them in containers and refrigerate until ready to stuff the shells.

Making Caramelized onions in the slow cooker

Add French bread into the bottom of a large casserole dish. Drizzle the bread with extra virgin olive oil, sprinkle with garlic powder, and fresh thyme leaves. Meanwhile, cook large pasta shells according to package directions.

French Onion Stuffed Shells Recipe

Drain the pasta shells and use a large spoon to generously fill the shells with the cooled, caramelized onions. Place the filled shells in a single layer on top of the prepared French bread.

Making French Onion Stuffed Shells

Grate Swiss and Gruyere cheeses and liberally cover the stuffed shells with the grated cheese. Top with additional fresh thyme leaves. Bake uncovered in a preheated 425-degree oven until the cheese is melted and golden and the shells are heated through approximately 30-35 minutes.

French Onion Stuffed Shells

Recipe for French Onion Stuffed Shells -

The following items are some suggested products I’ve chosen that will aid you in the making (and serving) of this recipe for Crave-Worthy French Onion Stuffed Shells if needed. By clicking on the item, you’ll be taken directly to if you’re interested in purchasing any of these products. You are in no way required to do so, and you will not be charged in any way unless you decide to purchase a product through Amazon.

0 from 0 votes
Crave-Worthy French Onion Stuffed Shells
Crave-Worthy French Onion Stuffed Shells
Prep Time
20 mins
Cook Time
9 hrs
Total Time
9 hrs 20 mins
Everything you love about French onion soup is in these Crave-Worthy French Onion Stuffed Shells. But now it's in a brand new (yet still incredibly delicious, and cheesy) unexpected form. -
Course: Main Course or Side Dish
Servings: 6 -8 servings
Renee - Kudos Kitchen: Renée - Kudos Kitchen
  • 4 tablespoons butter
  • 2 tablespoons olive oil
  • 5 large sweet onions sliced
  • ½ cup beef broth
  • ¼ cup red wine
  • 2 teaspoons salt
  • 1 teaspoon pepper
  • 5-6 fresh thyme sprigs plus 1 tablespoon of thyme leaves
  • 8 slices French bread
  • olive oil
  • 1 tablespoon garlic powder
  • 1 box large pasta shells cooked according to package directions. Drained.
  • 5 ounces Gruyere cheese shredded
  • 8 ounces Swiss cheese shredded
  • ¼ cup grated Parmesan cheese
  1. Add the butter, olive oil, sliced onions, beef broth, red wine, salt and pepper into the slow cooker. Top with the fresh thyme sprigs. Stir well.
  2. Cover the cooker and set to high. Cook for 8 hours on high, stirring occasionally.
  3. Cool the onions. Remove the thyme sprigs.
  4. *Note - The onions can be made in advance and kept in the refrigerator until ready to assemble the casserole.
  5. Preheat oven to 425 degrees.
  6. Line a baking dish with sliced French bread.
  7. Drizzle the bread with olive oil and evenly sprinkle with garlic powder and half of the fresh thyme leaves.
  8. Use a large spoon to liberally fill the cooked and cooled pasta shells with the cooled carmealized onions.
  9. Place the stuffed shells on top of the prepared French bread slices.
  10. Evenly spread the grated cheeses over the stuffed shells and sprinkle with the remaining fresh thyme leaves.
  11. Bake uncovered in a preheated oven for 30-35 minutes or until the cheese is melted and golden and the shells are heated through.
  12. Serve hot and enjoy!
Recipe Notes

Tools and equipment:

7 quart slow cooker
chefs knife and cutting board
box grater
wooden spoon
casserole dish

Dinner’s ready. Let’s eat!

Crave-Worthy French Onion Stuffed Shells -

Crave-Worthy French Onion Stuffed Shells Recipe -

Along with my food blog, I also run a small hand painted fabric and glassware business. Below is an example of my hand painted aprons. This is one of my favorite designs because I’ve always been a huge fan of Julia Child. Maybe you are too?

Cooking Quote Hand Painted Apron

I hope you’ve enjoyed this recipe for French Onion Stuffed Shells as much as I’ve enjoyed bringing it to you.

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Until we eat again, I hope you have a delicious day!

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  1. This recipe is genius and totally crave worthy! I love onion and pasta everything so this is a match made in heaven for me! YUM!

  2. This is absolutely amaaaazing!! I can’t wait to try it!!

  3. I have been drooling over this since I saw it on social media yesterday! 😉 My husband loves French onion soup, so I know he would love these stuffed shells.

  4. This is such a great idea! I cannot wait to try this out!

  5. Goodness, what a unique recipe. I love the idea of stuffing the shells with the delicious cooked onions and then topping it off with mounds of cheese. This has to be absolutely delicious!

  6. All that ooey-gooey cheese! Looks incredible.

  7. Renee–this is an incredible idea for a meal! I love it!

  8. amyengberson

    Gorgeous photos! And I’m absolutely in love with all that cheese!

  9. This is creative! Great pictures.

  10. Can’t wait to make this! Quick question – I’ve never seen a recipe with 8 hours on high. Should that read 8 hours on low?

    • Hi Diana,
      I did 8 hours on high because I wanted to get my onions as deeply caramelized as possible. Feel free to turn the cooker down to low and see how the onions are cooked according to your preference. I hope this answers your question.

  11. Just wanted to come back and tell you I cooked it according to your directions and it was absolutely delicious. Thank you!

    • I’m so thrilled for you, Diana! There is nothing you could tell me that would make me happier! Thanks for taking the time to come back and let me know that the recipe was successful for you! You are so welcome!!! 🙂

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