
If you need a satisfying dinner packed with flavor and happens to include veggies, this Hamburger Green Bean Casserole is a great pick. You’ve got beefy goodness, sweet green beans, and a rich, creamy sauce—all working together for an easy meal you’ll want again and again.
This dish was born out of one of those weeks when everything was a bit nuts and I needed real food, fast. My family loved it so much, they ask for it every couple weeks! This is my trick to getting a filling meal without babysitting the stove for ages.
Tasty Ingredients
- 1 cup French fried onions. Toss these on for tons of crunch. Any brand works, so grab whichever is handy.
- 1 cup shredded cheddar cheese. Sharp cheddar has the best bite, and shredding it fresh beats the bagged stuff every time.
- 1/2 cup milk. Whole milk gives the sauce a rich feel, but use what’s in the fridge.
- 1 can (10.5 oz) cream of mushroom soup. This shortcut makes your sauce creamy without any fuss. Look for the low-salt kind if you'd like.
- 1 can (15 oz) green beans, drained. Canned beans keep things simple and quick. No-salt ones are great for controlling saltiness.
- 1 pound ground beef. Go for 80/20 so you don’t lose flavor or end up with dry beef. The little bit of fat makes it good and hearty.
- 1 teaspoon onion powder. Sprinkles in that onion taste everywhere, no chopping required.
- 1 teaspoon garlic powder. Adds flavor depth without extra work—just shake and go.
- Salt and pepper to taste. Give it a taste at the end to personalize the seasoning.
Simple Step-by-Step Guide
- Add Crispy Onion Topping
- Grab your fried onions and scatter them over the casserole. Slide it back into the oven for another 5–10 minutes till things get toasty and golden above.
- Initial Bake
- Bake uncovered for 25 minutes. When the edges bubble and that cheese layer is melted, you’re in business.
- Add the Cheese Layer
- Once your base is spread, sprinkle cheese all over. It gives a gooey top and keeps everything from drying out.
- Prepare the Baking Dish
- Spray a 9×13 baking pan with a bit of oil. Dump in your mixture and use a spoon to get it all the way into each corner so it cooks evenly.
- Mix the Casserole Base
- Combine your browned beef, drained beans, mushroom soup, milk, powdered garlic and onion, salt, and pepper right in a big bowl. Stir it up till everything's coated and mixed through.
- Brown the Ground Beef
- In your biggest skillet, cook the ground beef over medium. Keep breaking it up as it browns, so you don’t have huge chunks. Drain it well so nothing gets soggy.
- Preheat the Oven
- Start out by cranking your oven to 350°F, so it’s hot and ready when you need it.

You can’t beat the crispy onion topping on this casserole—it reminds me of when Grandma baked her green bean classic for the holidays. That salty crunch gets everyone coming back for an extra scoop, and my kid always tries to swipe a few before dinner.
Make It Fancy
If you’ve got fresh green beans handy, chop up about 12 ounces, then toss them into boiling water for just three minutes. Shock them in a bowl of ice water right after to keep them bright and crisp. You’ll totally notice the color and the snappy texture against the creamy sauce.
How to Store and Reheat
Pop any leftovers in a sealed container in the fridge for up to three days. To reheat, cover with foil and put it in a 325°F oven for twenty minutes till hot. The microwave is quicker, but your onions will lose their crunch. If you’re planning on extras, stash some extra onions to add later so they stay crisp.
Fun Twists
This dish is easy to switch up! Toss in a cup of sliced mushrooms while browning your beef for more earthy taste. Want heat? Mix in a little cayenne or some chopped jalapeños. You could also swap cheddar for pepper jack cheese to give the sauce a kick.
Serving Ideas
This casserole’s hearty enough by itself, but I like to set out a simple green salad with vinaigrette to lighten things up. Warm rolls are great for soaking up the creamy goodness, and if it’s summer, some fresh tomato slices on the side taste awesome, too.
Common Queries
- → Can fresh green beans replace the canned ones?
Totally! Just blanch the fresh beans beforehand so they stay tender and perfect in the bake.
- → What kind of ground beef should I pick?
An 80/20 mix works great for a nice balance of taste and juiciness. Leaner beef is fine too but might make the dish a bit drier.
- → Can I prep this meal in advance?
Of course! Put it together, cover, and store it in the fridge. If you're baking it straight from cold, just tack on an extra 5-10 minutes to the cooking time.
- → Is there an alternative to cream of mushroom soup?
You can make your own creamy sauce or swap it with cream of chicken or celery soup for a new twist on flavor.
- → How do I keep the topping crunchy?
Wait until the last 5-10 minutes of baking to add the fried onions. That way, they stay crispy and don’t soak up too much moisture.