How many servings does this recipe make?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

What ingredients do I need for Yellow Squash Casserole?

You need 11 ingredients. The key ingredients include: 4 Tbsp. (1/2 stick) butter or margarine, 1 large yellow onion, peeled and finely chopped, 1 lb. yellow squash or zucchini, 1 egg, lightly beaten, and more.

Is Yellow Squash Casserole suitable as general?

Yes, Yellow Squash Casserole falls under the General category and is a great choice for this type of meal.

How do I store leftover Yellow Squash Casserole?

Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat gently before serving.

Yellow Squash Casserole Recipe

Name: Yellow Squash Casserole
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 4 Tbsp. (1/2 stick) butter or margarine; 1 large yellow onion, peeled and finely chopped; 1 lb. yellow squash or zucchini; 1 egg, lightly beaten; 1 c. shredded sharp Cheddar cheese (about 4 oz.); 1/8 tsp. ground nutmeg; 1/2 tsp. dried marjoram, crumbled (optional); pinch of dried thyme, crumbled (optional); 1/3 c. fine dry bread crumbs; pinch of salt; 1/8 tsp. black pepper

Try this homemade Yellow Squash Casserole recipe the whole family will love. Made with butter, yellow onion, yellow squash and egg. Easy step-by-step in…

This Yellow Squash Casserole relies on simple, everyday ingredients such as yellow squash or zucchini, egg, lightly beaten, ground nutmeg and fine dry bread crumbs. It comes together quickly and makes 4 servings, at about 407 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.

Updated Jun 30, 2026

Serves 4 General

Tips for the best results

Read through all the steps once before you start and measure out your ingredients first — it makes everything go more smoothly.
Taste as you go and adjust the seasoning before serving.
Avoid overcrowding the pan — cook in batches if needed for the best texture.
Let the dish rest for a few minutes before serving so the flavors settle.
Store leftovers in an airtight container in the fridge and enjoy within a few days.

Variations & substitutions

Use a neutral oil or a plant-based spread in place of butter for a dairy-free version.

No specific allergen information. Please check the ingredient list for possible allergens.

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Yellow Squash Casserole

Tips for the best results

Variations & substitutions

My Personal Notes

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