This Can't be Squash Casserole

Prep time: 15 min
Cook time: 50 min
Servings: 12
Yield: 12 servings

Description

Squash casserole with plenty of Cheddar cheese, creamy mushroom soup, and mayonnaise is such a rich and tasty side dish no one will know squash is the main ingredient.

Ingredients

cooking spray
4 pounds yellow squash, sliced
1/4 cup butter
1/2 cup chopped onion
1 (10 3/4 ounce) can cream of mushroom soup
1 cup Cheddar cheese
1 cup seasoned bread crumbs
1/2 (10 3/4 ounce) can milk
1/2 cup mayonnaise
1 teaspoon white sugar
2 eggs, beaten
salt and ground black pepper to taste

Directions

1 Preheat oven to 350 degrees F (175 degrees C). Spray a 9x13-inch casserole dish with cooking spray.
2 Bring a large pot of salted water to a boil; cook squash in the boiling water until very tender, 10 to 15 minutes. Drain and transfer squash to a large bowl; mash until evenly smooth.
3 Heat butter in a skillet over medium heat; cook and stir onion in the melted butter until tender, 5 to 10 minutes. Mix onion, cream of mushroom soup, Cheddar cheese, bread crumbs, milk, mayonnaise, sugar, eggs, salt, and pepper into mashed squash. Spread mixture evenly into the prepared casserole dish.
4 Bake in the preheated oven until bubbling and edges are lightly browned, 45 minutes to 1 hour.