My aunt refused to share this recipe for 30 years and I finally got it out of her

To keep this close to my aunt’s original, the core is just five main ingredients: ground beef, egg noodles, cream of mushroom soup, beef broth, and sour cream. The extra seasonings and oil are optional but helpful. For picky eaters, you can swap the cream of mushroom soup for cream of chicken or cream of onion if they dislike mushrooms; the texture stays the same but the flavor is milder.

If your kids like cheese, sprinkle 1–2 cups of shredded mozzarella or mild cheddar over the top during the last 10 minutes of baking for a cheesy crust. For a bit of crunch, you can add crushed butter crackers or French-fried onions on top during the final 5–10 minutes. To lighten it up slightly, use lean ground beef (93% lean) and light sour cream, or even plain Greek yogurt (use full-fat so it doesn’t curdle; stir it into the sauce mixture just before assembling).

You can also sneak in some veggies by stirring in 1–2 cups of frozen peas or mixed vegetables when you add the beef to the casserole dish—no need to thaw them. If you need to make it ahead, assemble the dish, cover tightly, and refrigerate up to 24 hours; add an extra 5–10 minutes to the covered baking time since it will be cold.

For food safety, always cook ground beef to at least 160°F (71°C) and drain excess grease carefully so it doesn’t splatter. Don’t leave the casserole out at room temperature for more than 2 hours; refrigerate leftovers promptly in shallow containers and eat within 3–4 days, reheating until steaming hot in the center. If reheating in the oven, cover with foil and add a splash of beef broth or water to keep it from drying out.