Can you use frozen squash in casserole?

Yes, but thaw and drain it thoroughly before using. Frozen squash holds extra water that can make your casserole too loose, so press out the moisture with a clean kitchen towel before adding it to the mix.

What’s the best topping besides crackers?

If you want to switch it up, try panko breadcrumbs, crushed cornflakes, or even stuffing mix for a more savory crunch. A sprinkle of extra cheese on top before baking adds a gooey golden finish.

Can this yellow Squash casserole be made gluten-free?

Absolutely. Just substitute the crackers with your favorite gluten-free crumb topping; like almond flour mixed with butter or a gluten-free panko alternative. Make sure all other ingredients (cheese, mayo) are certified gluten-free too.

What herbs go well in squash casserole?

Fresh thyme, chives, or a little basil can brighten the flavor. For a deeper note, try a pinch of smoked paprika or rosemary. Just a small amount goes a long way.

Yellow Squash Casserole with Cheese: 10 Ingredients, Full Flavor

Name: Yellow Squash Casserole with Cheese
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Cuisine: Southern
Ingredients: 4 cups yellow squash, thinly sliced; 1 small yellow onion, finely chopped; 2 large eggs, lightly beaten; 1/2 cup milk; 1/4 cup sour cream or mayonnaise; 1 cup sharp cheddar cheese, shredded; 1/4 cup Parmesan cheese (optional); 1 cup crushed buttery crackers (Ritz-style); 3 tbsp unsalted butter, melted; Salt and pepper to taste; 1/2 tsp thyme or garlic powder (optional)

Ingredients

Scale

4 cups yellow squash, thinly sliced
1 small yellow onion, finely chopped
2 large eggs, lightly beaten
1/2 cup milk
1/4 cup sour cream or mayonnaise
1 cup sharp cheddar cheese, shredded
1/4 cup Parmesan cheese (optional)
1 cup crushed buttery crackers (Ritz-style)
3 tbsp unsalted butter, melted
Salt and pepper to taste
1/2 tsp thyme or garlic powder (optional)

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Instructions

1. Preheat oven to 375°F (190°C). Grease a 9×13-inch baking dish.
2. Steam or sauté sliced squash and chopped onions until tender. Drain and let cool.
3. In a large bowl, whisk eggs, milk, sour cream or mayo, salt, pepper, and optional herbs.
4. Fold in the cooked squash, cheddar, and Parmesan cheese.
5. Spread mixture into prepared baking dish.
6. Mix crushed crackers with melted butter and sprinkle evenly over the top.
7. Bake uncovered for 25–30 minutes, or until golden and set.
8. Let rest for 10 minutes before serving.

Notes

Add cooked bacon or sausage for a heartier dish.
Substitute gluten-free crackers for a gluten-free version.
To make ahead, assemble the casserole without the topping and refrigerate up to 12 hours. Add topping just before baking.

Author: Chef Saly
Prep Time: 15 minutes
Cook Time: 30 minutes
Category: Side Dish
Method: Baking
Cuisine: Southern
Diet: Vegetarian

Nutrition

Serving Size: 1 slice
Calories: 280
Sugar: 5g
Sodium: 380mg
Fat: 18g
Saturated Fat: 8g
Unsaturated Fat: 8g
Trans Fat: 0g
Carbohydrates: 19g
Fiber: 2g
Protein: 9g
Cholesterol: 75mg