Onions Au Gratin

Onions Au Gratin


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


30 m servings 228 cals
Serving size has been adjusted!

Original recipe yields 8 servings



  • Calories:
  • 228 kcal
  • 11%
  • Fat:
  • 17.4 g
  • 27%
  • Carbs:
  • 10.7g
  • 3%
  • Protein:
  • 8.2 g
  • 16%
  • Cholesterol:
  • 55 mg
  • 18%
  • Sodium:
  • 297 mg
  • 12%

Based on a 2,000 calorie diet

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  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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  1. 17 Ratings


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

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...

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'l...

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 a...

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.

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

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

So bad but sooooo good!

perfect! I used veg broth (what I had on hand) and half and half (again on hand). glad my kids don't do onions- more for ME!