Onions Au Gratin Recipe - Allrecipes.com
Onions Au Gratin Recipe
  • READY IN 30 mins

Onions Au Gratin

Recipe by  

"This cheesy onion side dish is a household favorite at Thanksgiving dinner."

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Ingredients Edit and Save

Original recipe makes 1 - 8 inch square dish Change Servings
  • COOK

    30 mins

    30 mins


  1. Preheat the oven to 350 degrees F (175 degrees C). Grease an 8 inch square baking dish.
  2. Melt the butter in a large skillet over medium heat. Add onions; cook and stir until tender, about 5 minutes. Transfer to the prepared baking dish. In a medium bowl, stir together the beef broth and flour until smooth. Mix in the cream and season with salt and pepper; pour over the onions. Sprinkle Swiss cheese and Parmesan cheese over the top.
  3. Bake for 25 to 30 minutes in the preheated oven, until cheese is golden brown and the sauce is bubbly.
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Reviews More Reviews

Most Helpful Positive Review
Dec 22, 2007

this is an absolute wonderful recipe. if you like onions this is the recipe to try, don't change anything.

Most Helpful Critical Review
Sep 16, 2008

I really wanted this recipe to be great - but it was a disaster! I should have known something would go wrong since onions give off a lot of water/juices when they cook! The end result was NOT a traditional "au gratin" dish but more of cheesy soupy onion mess. It was hardly edible and a great disappointment (not to mention waste of perfectly good onions)! My only recommendation/suggestion for fixing this would be to bake the onions first without the mixture - pour off the excess liquid - then add the flour/cream mixture and cheeses and bake again... that's the only thing that comes to mind to avoid the soup I ended up with. However, with that said - I will NOT be making this again!

Nov 17, 2010

This is absolutely one of my most favorite sides. I suggest, if you can find them in your area, using the sweets. And using Campbell's double strength beef broth really amps up the flavor, you'll just have to cut out the excess salt. And a little more cheese never hurt anyone. ;)

Aug 18, 2010

This was pretty good. The onions were surprisingly sweet. Didn't have cream so used milk instead. I'm sure the cream would have made it richer but I don't know that it needed it. Will make again.

Apr 01, 2008

wonderful way to use onions. i used a variety of cheeses on the top because i didn't have enough swiss (cheddar, colby-jack) whole family enjoyed this as a side.

Nov 07, 2011

Wonderful side dish! My dinner guest loved them and asked for the recipe.

Jun 21, 2011

Rich and delicious is a great way to describe this recipe. I halved this recipe and we ate it all. Thanks Clammers for sharing.

Nov 30, 2011

So bad but sooooo good!


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  • Calories
  • 228 kcal
  • 11%
  • Carbohydrates
  • 10.7 g
  • 3%
  • Cholesterol
  • 55 mg
  • 18%
  • Fat
  • 17.4 g
  • 27%
  • Fiber
  • 1.5 g
  • 6%
  • Protein
  • 8.2 g
  • 16%
  • Sodium
  • 297 mg
  • 12%

* Percent Daily Values are based on a 2,000 calorie diet.

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