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 Edna'S No Mistake Yellow Squash Casserole?

You need 14 ingredients. The key ingredients include: 5 c. sliced yellow squash (2 to 3), 1/2 c. chopped onion, 1/2 c. chopped green pepper, 1/2 c. chopped sweet red pepper, and more.

Is Edna'S No Mistake Yellow Squash Casserole suitable as general?

Yes, Edna'S No Mistake Yellow Squash Casserole falls under the General category and is a great choice for this type of meal.

How do I store leftover Edna'S No Mistake Yellow Squash Casserole?

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

Edna'S No Mistake Yellow Squash Casserole Recipe

Name: Edna'S No Mistake Yellow Squash Casserole
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 5 c. sliced yellow squash (2 to 3); 1/2 c. chopped onion; 1/2 c. chopped green pepper; 1/2 c. chopped sweet red pepper; 2 Tbsp. margarine; 3/4 c. mayonnaise; 1/2 c. grated medium Cheddar cheese; 1 egg, beaten; 1 Tbsp. sugar; 3/4 tsp. garlic powder; 1/2 tsp. salt; 1 1/2 tsp. Worcestershire sauce; 1/4 tsp. ground red pepper (optional); 1/2 c. crushed cracker crumbs

Try this homemade Edna'S No Mistake Yellow Squash Casserole recipe the whole family will love. Made with onion, green pepper, sweet red pepper and marga…

This Edna'S No Mistake Yellow Squash Casserole relies on simple, everyday ingredients such as chopped onion, chopped green pepper, chopped sweet red pepper and margarine. It comes together quickly and makes 4 servings, at about 510 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

Brown sugar instead of white sugar adds a deeper, more caramel-like flavor.

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

My Personal Notes

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Edna'S No Mistake Yellow Squash Casserole

Tips for the best results

Variations & substitutions

My Personal Notes

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