When you want to frugally feed a crowd for game day, or a hungry family at dinner, it doesn't get much tastier than French Onion Sloppy Joes!
Easy-to-make homemade ground beef sloppy joes are smothered with plenty of melted Swiss cheese and then are topped with a mound of deeply caramelized, thyme-infused, onions.
What's not to love?!!
- The ingredient list:
- Kitchen tools and equipment needed:
- How this easy sandwich recipe came to be:
- Why this recipe works?
- Can French onion sloppy joes be frozen after cooking?
- How to Reheat French onion sloppy joes after freezing:
- How long will these sloppy joes keep in the refrigerator?
- How to make thyme-infused caramelized onions:
- How to make French Onion Sloppy Joes:
- Want more easy recipes that everyone will love?
- Printable Recipe Card
- French Onion Sloppy Joes
The ingredient list:
**Note - The following lists of ingredients plus kitchen tools and equipment contain affiliate links (highlighted in blue) for your consideration and shopping convenience. #CommissionsEarned
- sweet onions, sliced
- fresh thyme sprigs
- ground beef
- chopped celery
- tomato paste
- brown sugar
- apple cider vinegar
- Swiss cheese slices
- grapeseed oil, or other neutral-flavored light oil
- salt and pepper
Kitchen tools and equipment needed:
- large skillet
- chef's knife
- cutting board
- cooking twine (optional)
- measuring cups and spoons
- wooden spoon or spatula
How this easy sandwich recipe came to be:
This is a recipe idea that came to me in the middle of the night and made me grab my pen and paper.
When something like that happens it usually takes me a while to fall back asleep, but this time I drifted back easily, and you can bet that I was dreaming about these French Onion Sloppy Joes!
If you want to get fancier and add more ingredients to your ground beef mixture, have at it.
I, however, wanted to keep things simple so that the flavor of the thyme-infused caramelized onions would shine in this sandwich.
Why this recipe works?
And, when you factor in that these French Onion Sloppy Joes cost only pennies per serving, you'll want to add these to the family dinner roster on a regular rotation! SCORE!
It honestly doesn't get much easier or more delicious than this!
French Onion Pork Chops (shown in the featured video) is one of my most popular dinner recipes...EVER! Make sure to add it to your menu calendar too. 🙂
Can French onion sloppy joes be frozen after cooking?
Sure thing! Just don't freeze the French onion sloppy joes already made as sandwiches as the buns will get soggy when thawed.
My suggestion is to cool the ground beef and the caramelized onion mixture separately in airtight freezer containers and freeze for up to 3 months.
How to Reheat French onion sloppy joes after freezing:
Thaw the sloppy joe and caramelized onions completely.
Reheating can be done in microwave-safe containers on medium-high power, stirring occasionally.
OR, add the thawed sloppy joes to a skillet and reheat over medium/high heat, stirring occasionally, until hot.
Add cheese slices after heating.
How long will these sloppy joes keep in the refrigerator?
If kept in an airtight container, French onion sloppy joes will keep for 7 days.
To save on space, the sloppy joes and the caramelized onions may be kept in the same container if desired.
How to make thyme-infused caramelized onions:
- Melt butter and oil in a large, heavy skillet.
- Slice 3 - 4 sweet onions and add them to the skillet, tossing to coat with the butter.
- Make a thyme bundle and add them to the skillet along with the onions.
- Cook the onions over medium heat (stirring occasionally) until they've turned a deep golden brown and have cooked down considerably. *Note - this will take approximately 15 minutes.
- Season with salt and pepper. Stir well.
- Remove the thyme bundle from the skillet and use the onions immediately, or store them covered in the fridge for up to 4 days.
How to make French Onion Sloppy Joes:
- Brown ground beef and diced celery in a large skillet over medium-high heat. Season with salt and pepper.
- Stir in tomato paste and brown sugar.
- Add a splash of apple cider vinegar and cook, stirring frequently until the beef is no longer pink and the sloppy joes are heated through.
- Serve on buns with a slice of Swiss cheese and mounds of thyme-infused caramelized onions.
Want more easy recipes that everyone will love?
- Parmesan Onion Appetizer Squares
- Spicy Thai Pulled Pork Sandwiches for the Slow Cooker
- Cinnamon Praline Pretzels
- Hot Patty Melt Dip
- Sloppy Sausage Bean Dip
- Sloppy José Hot Dogs with Black Beans and Chiles
- Slow Cooker Split Pea Soup with Ham
- Apple Oatmeal Cookies with White Chocolate
⭐If you've made this recipe, or are excited to make this recipe, I'd appreciate it if you'd take a moment to leave it a star rating on the recipe card, along with a comment if you're so inclined. Thank you. 🙂
Printable Recipe Card
French Onion Sloppy Joes
For the thyme-infused caramelized onions:
- 4 sweet onions , sliced
- 3 tablespoons butter
- 10 sprigs thyme
- butchers twine
- ½ teaspoon salt
- ¼ teaspoon pepper
For the homemade sloppy joes:
- 2 pounds ground beef
- 1 cup celery , diced
- 6 ounces tomato paste
- ¼ cup brown sugar , packed
- 3 tablespoons apple cider vinegar
- 2 teaspoons salt
- 1 teaspoon pepper
- 10 slices Swiss Cheese
- 10 hamburger buns
- 2 tablespoons grapeseed oil
To make the thyme-infused caramelized onions:
- Melt the butter and oil in a large skillet over medium heat. Add the onion slices. Stir well.
- Make a thyme bundle by wrapping the thyme sprigs with butcher's twine or wrap them in cheesecloth.
- Add the thyme bundle to the onions. Cook, over medium heat, stirring occasionally until the onions are deeply caramelized and reduced. Remove the thyme and discard. Season with salt and pepper. Stir.
- Keep the onions warm until serving or cover and refrigerate for up to 4 days if making them in advance.
To make the homemade sloppy joes:
- In a large skillet, brown the ground beef and chopped celery.
- Stir in the tomato paste and cook for an additional 2-3 minutes, stirring occasionally.
- Stir in the brown sugar and apple cider vinegar. Season with salt and pepper.
- Cook, stirring occasionally, for an additional 3-4 minutes until the flavors have married and the sloppy joes are heated through.
- Serve the sloppy joes on buns and top with slices of Swiss cheese and a helping of thyme-infused caramelized onions.
I sincerely hope you've enjoyed today's easy sandwich recipe for French Onion Sloppy Joes as much as I've enjoyed bringing it to you!
Thank you so much for visiting me today in my Kudos Kitchen. I hope you found something you'll love and that you'll come back and visit me often. There is always room for you around my table!
Should you have any questions or comments regarding anything you've seen here on my blog, please don't hesitate to reach out to me. It is always my distinct pleasure to respond to you just as soon as I possibly can.