
This Cheesy Green Bean Casserole is the answer when you want to bring familiar comfort with a touch of creamy, melty indulgence to your holiday table. It transforms the classic side dish with a gooey cheddar sauce and layers of crisp fried onions for a crowd-pleasing favorite that disappears fast. I turn to this recipe every Thanksgiving and sometimes for Sunday dinner just because my family begs for it.
I first put this version together when my in-laws requested something different for Christmas dinner and now I cannot imagine the holidays without it.
Ingredients
- Fresh or frozen green beans: the main vegetable pick bright green firm beans for best taste
- Butter: adds that essential richness salted butter gives extra flavor if you have it
- Garlic: fresh cloves add a subtle kick choose plump bulbs with tight skin
- All purpose flour: thickens your sauce use unbleached flour for a clean taste
- Milk: creates the creamy base whole milk makes it luscious and rich
- Cheddar cheese: best freshly shredded from a block for smooth melting
- Parmesan cheese: brings a nutty salty punch grate fresh for boldest flavor
- Cream of mushroom soup: a classic for that nostalgic creamy texture look for low sodium if possible
- Salt and black pepper: taste as you go for perfect seasoning
- Paprika: optional for warmth and subtle spice use fresh paprika for best color
- Fried onions: the beloved crunchy topper check for freshness and crispness
Step-by-Step Instructions
- Preheat and prep:
- Set your oven to 375 degrees Fahrenheit. Lightly grease a nine by thirteen inch baking dish with butter or nonstick spray to prevent sticking.
- Blanch the green beans:
- Boil a large pot of salted water. Drop in the trimmed and cut green beans. Boil for about three minutes just until they turn bright green. Immediately drain and dunk them in ice water to stop the cooking so they stay vibrant and crisp. Drain completely and set aside.
- Make the cheese sauce:
- Melt butter in a saucepan over medium heat. Add minced garlic and stir for thirty seconds just until fragrant being careful not to brown. Stir in flour and cook for a full minute whisking non stop to make a smooth paste. Gradually pour in the milk whisking all the time. Let the sauce simmer gently and thicken which should take three to five minutes. Stir in your shredded cheddar parmesan cream of mushroom soup salt pepper and paprika. Keep whisking until everything is lush smooth and creamy.
- Combine and assemble:
- In a large bowl toss the green beans with your cheese sauce. Mix until every bean is coated in the velvety mixture. Pour everything into your prepared baking dish and spread out evenly for the best bake.
- Bake and finish with onions:
- Slide the dish into your oven and bake uncovered for twenty minutes. Remove briefly and sprinkle the fried onions generously over the top so every bite gets that crunch. Return to the oven for five more minutes so the topping turns golden and crispy.
- Serve and enjoy:
- Let your casserole rest a few minutes before serving to help it set. Scoop onto plates and watch it disappear fast.

My favorite ingredient has to be the cheddar cheese especially when I shred it fresh from the block. The melt is perfectly creamy and my daughter always wants to sneak a handful just before it goes into the dish. Some of my best memories are of her helping me sprinkle the onions on top before we bake it together.
How to Store Cheesy Green Bean Casserole
Let the casserole cool to room temperature before covering tightly with foil or a reusable lid. Refrigerate leftovers up to four days. To freeze cool completely then wrap in heavy duty foil and freeze for up to two months. Reheat in a moderate oven until bubbly and golden on top.
Ingredient Swaps and Tips
If you’re out of cream of mushroom soup make your own sauce with half a cup of heavy cream and sauté half a cup of finely chopped mushrooms in butter. For extra crunch try mixing panko breadcrumbs with the fried onions before topping. Fresh green beans give the brightest flavor but frozen work perfectly if thawed and drained well.
Serving Suggestions

This casserole loves to share the plate with roast turkey or chicken. Pair with mashed potatoes for pure comfort and serve dinner rolls for soaking up that extra cheese sauce. For a vegetarian meal try it alongside nut loaf and glazed carrots.
Cultural and Historical Note
Green bean casserole was first served in the 1950s and became an American holiday tradition. It is a classic potluck favorite and for many families it means togetherness and comfort on special days. Homemade touches like real cheese give this time honored dish a fresh update.
Common Recipe Questions
- → What type of green beans work best?
Fresh green beans offer the best texture, but frozen green beans are a convenient and tasty alternative. Trim and cut into 2-inch pieces for even cooking.
- → Can I substitute the cream of mushroom component?
Absolutely! Blend sautéed mushrooms with heavy cream to create a homemade alternative if you prefer a fresher option.
- → How do I make the topping extra crispy?
Mix panko breadcrumbs with your fried onions before baking for added crunch and texture on top.
- → Can I prepare the dish ahead of time?
Yes. Assemble the casserole without the fried onions and refrigerate for up to 24 hours. Add onions just before baking.
- → Does the cheese make a difference?
Shredding cheese from a block ensures it melts smoothly for a gooey, rich sauce. Pre-shredded cheese may not melt as well.