Pearl Onion Mushroom Bake

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"In Livermore, California, Diane Caragio assembles this saucy side dish days before she needs it. 'Take one out of the freezer in the morning, and it's ready to be baked for dinner,' she offers. 'It's great with turkey or ham.'"
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1 h 10 m servings
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Original recipe yields 8 servings



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  1. In a small saucepan, combine the onions, water and salt. Cover and cook for 20 minutes or until crisp-tender; drain. Transfer to two greased 1-qt. baking pans; set aside. In a skillet, saute mushrooms in 4 tablespoons butter and lemon juice. In a small saucepan, melt 4 tablespoons butter; stir in flour until smooth. Gradually add milk. Bring to a boil; cook and stir for 2 minutes or until thickened. Stir into mushroom mixture. Pour over onions. Melt the remaining butter. Add cheese and bread crumbs; toss to coat. Sprinkle over each casserole. Cover and freeze one casserole for up to 3 months. Cover and bake the second casserole at 375 degrees F for 15 minutes. Uncover; bake 10 minutes longer or until golden brown. To use frozen casserole: Thaw in the refrigerator for 8 hours. Bake as directed.


  1. 11 Ratings

Most helpful positive review

This has become a family tradition at Thanksgiving. The whole family just loved it.

Most helpful critical review

Just OK

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This has become a family tradition at Thanksgiving. The whole family just loved it.

Svelte onion & mushroom flavors. Very nice indeed. This will be my pearl onion casserole from now on!

I tried this with triple the mushrooms & chopped onions & shallots. Did not increase amount of sauce & there was a lot. Try again with pearl onions.

My husband loved this but, I think it needs a little something. Maybe some thyme or additional seasoning. I'm going to try it again because I'm hoping to use it as a sidedish for Thanksgiving.

We really liked this side dish! Will certainly make again and am going to try wine instead of the lemon juice, add a touch of minced garlic, and use a three cheese mix from my deli instead of t...

It was a big hit with my family! I added extra cheese to fully cover the top of the casserole and my picky child loved it. (It helped that I didn't tell him what he was eating before he tried it...

i made this for thanksgiving and my family is still talking about it. definitely a keeper! it was delicious. i wonder if frozen pearl onions would come out just as good...

Made this the day before for Thanksgiving dinner. Everyone loved it. Needed some salt and pepper. I baked it all in a 13 x 9 pan.

I thought this was an awesome dish. It freezes well.

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