Summer Squash Mushroom Casserole Recipe
Summer Squash Mushroom Casserole Recipe photo by Taste of Home
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Summer Squash Mushroom Casserole Recipe

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This rich, creamy side with its crunchy topping would make a wonderful dish to take to summer potlucks and picnics, or to pair up with a wide variety of entrees. You'll love the buttery flavor of these "comfort veggies!" —Jennifer Wallace, Canal Winchester, Ohio
TOTAL TIME: Prep: 20 min. Bake: 25 min.
MAKES:10 servings
TOTAL TIME: Prep: 20 min. Bake: 25 min.
MAKES: 10 servings


  • 2 medium yellow summer squash, diced
  • 1 large zucchini, diced
  • 1/2 pound sliced fresh mushrooms
  • 1 cup chopped onion
  • 2 tablespoons olive oil
  • 2 cups shredded cheddar cheese
  • 1 can (10-3/4 ounces) condensed cream of mushroom soup, undiluted
  • 1/2 cup sour cream
  • 1/2 teaspoon salt
  • 1 cup crushed butter-flavored crackers (about 25 crackers)
  • 1 tablespoon butter, melted

Nutritional Facts

2/3 cup: 234 calories, 16g fat (8g saturated fat), 36mg cholesterol, 564mg sodium, 14g carbohydrate (4g sugars, 2g fiber), 8g protein.


  1. In a large skillet, saute the summer squash, zucchini, mushrooms and onion in oil until tender; drain.
  2. In a large bowl, combine the vegetable mixture, cheese, soup, sour cream and salt. Transfer to a greased 11x7-in. baking dish. Combine cracker crumbs and butter. Sprinkle over vegetable mixture.
  3. Bake, uncovered, at 350° for 25-30 minutes or until bubbly. Yield: 10 servings.
Originally published as Summer Squash Casserole in Simple & Delicious May/June 2009, p37

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annlindblad User ID: 7743001 250280
Reviewed Jul. 10, 2016

"Wonderful - the mushrooms add a nice touch."

DRSchmitgall User ID: 2724529 234221
Reviewed Oct. 8, 2015

"Turned out excellent and was a hit with the adults. The kiddos didn't like it (I presume the squash texture was the killer). Still giving a 5 star rating for it WAS THAT GOOD!"

alfoa User ID: 2078080 233461
Reviewed Sep. 26, 2015

"I've been making this recipe WAY before it was printed in taste of home; not sure where I got the original recipe from. A great side dish, sometimes it's a little on the runny side. But good."

catnapper7 User ID: 4135210 219964
Reviewed Feb. 7, 2015

"I've made this recipe many times and it's one of my favorites. I passed it along to my daughter and she is also a big fan of it. The only change I make is substituting fat free ingredients where possible. I don't think it effects the taste negatively in anyway. I especially enjoy this casserole as a cold leftover."

Joscy User ID: 2694585 210781
Reviewed Jun. 13, 2014

"For as good as this looks and sounds, particularly notice carb.count appears to be ***diabetic friendly***. Very6 much enjoy reading others' ideas on this recipe. Particularly like idea of adding sweet red pepper!"

Schunka21 User ID: 4336465 210780
Reviewed Sep. 3, 2013

"I omitted the mushrooms and added green pepper instead. Will make it again. it was wonderful."

zucchini lady User ID: 2608427 168552
Reviewed Aug. 24, 2013

"was looking for a recipe to use up some zucchini and found was a great hit/had it with pork chops on the grill- will be keeping this in my 'FAVORITE file.."

zucchini lady User ID: 2608427 105247
Reviewed Aug. 19, 2013

"this is a keeper!! we are zucchini lovers and my family cleaned it up! did add red diced pepper and had some pepproni I dicded many ways you can change this recipe and it is still so good.."

cLeighw User ID: 2420825 163963
Reviewed Mar. 24, 2013

"Served this to guests and they asked for the recipe. Everyone loves this!"

jackiep1 User ID: 4586617 163960
Reviewed Jan. 27, 2013

"I love this recipe. easy to make and very good"

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